Research Article |
Corresponding author: Cassio A. P. Toledo ( cassioxtoledo@gmail.com ) Academic editor: Blanca León
© 2020 Cassio A. P. Toledo, Vinicius Castro Souza, Eve J. Lucas.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Toledo CAP, Castro Souza V, Lucas EJ (2020) Nomenclatural and taxonomic updates in Rourea subgen. Rourea sect. Multifoliolatae (Connaraceae). PhytoKeys 169: 137-175. https://doi.org/10.3897/phytokeys.169.54297
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The pantropical genus Rourea Aubl. (Connaraceae) is composed of ca. 70 species, most of which occur in the Neotropics. Rourea is currently subdivided into three subgenera, with the American taxa included in Rourea subgen. Rourea.
Brazil, Cnestideae, new species, Oxalidales, systematics, typification
Rourea Aubl. is the second largest genus in Connaraceae and includes about 70 species (
The most recent phylogenetic study and currently accepted classification of Connaraceae was an early cladistic study, based exclusively on morphological evidences (
The circumscription of Rourea has varied greatly since the publication of the genus by
Infrageneric classification of Rourea has also varied depending on author’s concept.
This treatment includes the species belonging to Rourea subgen. Rourea sect. Multifoliolatae, which are restricted to Brazil and morphologically characterised by the leaves (3–)9–41-foliolate, leaflets usually oblong or narrowly elliptic and smaller than those found in other neotropical Rourea and flowers with staminal tubes (0.8–)1–1.5 mm long (
After
The present study was primarily developed based on consultation of literature specific to the genus (
General morphological terms mainly follow
Geographic distribution maps were prepared using ArcGIS 10.5 (
While referring to Brazilian states, the following abbreviations were adopted: Bahia (BA), Distrito Federal (DF), Espírito Santo (ES), Minas Gerais (MG) and Rio de Janeiro (RJ).
Rourea blanchetiana (Progel) Kuhlm.
Lianas , subshrubs, shrubs or scandent shrubs, rarely treelets, (0.35–) 0.5–4(–7) m tall; branchlets usually lenticelate. Leaves alternate, (3–)9–41-foliolate, loosely disposed or congested, without stipules; petiole and rachis with glandular trichomes or eglandular; leaflets subsessile or pulvinulus 1–2 mm long; blades usually oblong, narrowly elliptic or narrowly ovate, less frequently elliptic, ovate or narrowly obovate, occasionally orbicular on basal leaflets, chartaceous, less frequently coriaceous or membranaceous, abaxially brownish, greenish or glaucous, rarely vinaceous, glabrous, subglabrous, hirsute or villous, base slightly asymmetric to asymmetric, rarely symmetric, apex usually rounded or narrowly rounded, less frequently obtuse, rarely acute (apical leaflets), margin flat, slightly revolute or revolute; secondary venation brochidodromous, tertiary venation reticulate. Inflorescences in cymes, occasionally panicles or thyrses, axillary or subterminal, rarely terminal; peduncle, rachis and lateral branches (if present) with glandular trichomes or eglandular. Flowers loosely disposed or congested apically; pedicel with glandular trichomes or eglandular; sepals 5, slightly connate at base, outer surface with glandular trichomes or eglandular; petals 5, epunctate; stamens 10, connate at base by (0.8–)1–1.5 mm, shorter series 5, epipetalous, longer series 5, episepalous, anthers rimose; carpels 5, only 1 developing into a fruit, free, sessile, stigma lobate, ovules 2, only 1 developing into a seed. Fruits follicular, ellipsoid, straight, calyx accrescent, sepals ascending; seeds 1, ellipsoid, black, without endosperm, arillode covering the base.
Rourea subgen. R. sect. Multifoliolatae is composed of 12 species exclusively found in the Brazilian states of Bahia, Distrito Federal, Espírito Santo, Minas Gerais and Rio de Janeiro.
This section is characterised by multifoliolate leaves, leaflets relatively small, normally oblong or narrowly elliptic with rounded apex (Fig.
1 | Plants eglandular | 2 |
– | Plants with glandular trichomes on inflorescence rachis, pedicel and/or outer surface of sepals | 5 |
2 | Leaves 3–7(–9)-foliolate; calyx covering two thirds of the fruit | R. macrocalyx |
– | Leaves 7–41-foliolate; calyx covering one third of the fruit | 3 |
3 | Inflorescence rachis 3.5–11.5 cm long | R. discolor |
– | Inflorescence rachis up to 1.8 cm long | 4 |
4 | Leaves 11–17(–41)-foliolate; inflorescence rachis sparsely pubescent to pubescent; ovary hirsute | R. bahiensis |
– | Leaves 7–11-foliolate; inflorescence rachis glabrous or subglabrous; ovary hirsute only on one side | R. barbata |
5 | Leaves 27–39-foliolate; leaflets abaxially glaucous; petals 9–14 mm long | R. blanchetiana |
– | Leaves 3–27-foliolate; leaflets abaxially greenish or brownish; petals (4–)5–8(–9) mm long | 6 |
6 | Subshrubs | 7 |
– | Lianas, shrubs or scandent shrubs | 8 |
7 | Subshrubs erect; leaflets coriaceous; inflorescence rachis 4–9.5 cm long; fruits 1–1.4 × 0.4–0.6 cm, completely velutinous externally | R. chrysomalla |
– | Subshrubs prostrate; leaflets chartaceous; inflorescence rachis 1.3–2.2 cm long; fruits 0.8–1×0.3–0.4 cm, sparsely hirsute externally | R. prostrata |
8 | Leaves 5–7-foliolate | 9 |
– | Leaves 9–27-foliolate | 10 |
9 | Petiole 1.3–2.2 cm long; basal pair of leaflets 1.4–2 cm long; inflorescences in cymes | R. diamantina |
– | Petiole 2.7–7 cm long; basal pair of leaflets 2.3–7.7 cm long; inflorescences in thyrses or panicles | R. tenuis |
10 | Leaflet apex rounded, rarely obtuse; pedicel ca. 2 mm long | R. martiana |
– | Leaflet apex obtuse or narrowly rounded, rarely acute or rounded; pedicel 3–14 mm long | 11 |
11 | Peduncle 2.8–8 cm long; flowers congested apically; central and north-eastern MG | R. cnestidifolia |
– | Peduncle 0.2–1.7 cm long; flowers loosely disposed; central and southern BA, eastern ES and eastern and central RJ | 12 |
12 | Branchlets subglabrous or sparsely pubescent; leaves 5–9(–13)-foliolate; rachis 3–6(–8.5) cm long; petals 2.5–3 mm wide; central BA | R. diamantina |
– | Branchlets densely velutinous to glabrescent; leaves (9–)15–27-foliolate; rachis 9–24 cm long; petals 1.5–2 mm wide; southern BA, east coast ES and eastern RJ | R. glazioui |
Brazil. Bahia: Belmonte, mata costeira, 31 Jan 1967 (fr.), R. P. Belém & R. S. Pinheiro 3225 (Holotype: NY barcode NY 00010955!; isotypes: CEPEC!, MG!, NY!, UB!).
Lianas or scandent shrubs, 1–7 m tall; branchlets glabrous or sparsely puberulous, lenticels abundant, conspicuous or inconspicuous. Leaves (9–)11–17(–41)-foliolate, congested; petiole 0.6–2.2 cm long, villous to glabrescent, eglandular; rachis 3.5–6.5 cm long, villous to glabrescent, eglandular; leaflets subopposite to alternate, subsessile or pulvinulus ca. 1 mm long; blade of the basal pair of leaflets 0.6–1.1 × 0.5–0.8 cm, orbicular, others 1.1–2.2(–2.4) × 0.7–1 cm, narrowly elliptic, oblong or narrowly ovate, chartaceous or coriaceous, concolorous, rarely discolorous, sparsely villous to glabrescent on both surfaces, more densely on midvein, abaxially brownish or greenish, adaxially dull, base slightly asymmetric, cordate, subcordate or rounded, apex rounded, margin flat to revolute, glabrous or ciliate; midvein abaxially slightly prominent, adaxially flat, secondary veins 4–5 pairs, flat on both surfaces, tertiary veins flat on both surfaces. Inflorescences in axillary or ramiflorous cymes or determinate thyrses; bracts ca. 2 mm long; peduncle 1–10 mm long, sparsely pubescent to pubescent, eglandular; rachis 0.3–1.7 cm long, sparsely pubescent to pubescent, eglandular; lateral branches 0.8–2.5 cm long, glabrous or pubescent, eglandular. Flowers loosely disposed; buds 2–3 × 2 mm, ellipsoid or obovate; pedicel 7–12 mm long, eglandular, 1–2 bracteoles located up to the lower half, persistent; sepals 4–4.5 × 1.5 mm, chartaceous, ovate, outer surface glabrous, subglabrous or sparsely pubescent, eglandular, inner surface glabrous or subglabrous, margin ciliate, more densely at the apex; petals 5–6 × 1.5–2 mm, narrowly elliptic or narrowly obovate, glabrous on both surfaces; stamens connate at base by 0.8–1 mm, shorter series 2–4 mm long, longer series 2.5–6 mm long, glabrous; ovary 1–1.2 mm long, hirsute, style 2–2.5 mm long, sparsely hirsute, glabrous only at the apex, stigma peltate, bilobate. Fruits 1.1–1.3 × 0.4–0.6 cm, yellowish or reddish, outer surface sparsely puberulous, inner surface glabrous, apex obtuse, style partially persistent, calyx covering one third of the fruit; seeds ca. 0.8–1 × 0.3–0.5 cm, arillode orangish.
This species has only been found in Bahia and Espírito Santo (Fig.
Brazil. Bahia: Porto Seguro, RPPN Veracruz (Veracel Celulose), rodovia que atravessa a reserva, antiga entrada para Santa Cruz Cabrália, ca. 2 km do centro de visitantes, 16°09'27"S, 39°09'15"W, 02 Nov 2001 (fl.), J. G. Jardim & R. V. Lopes 3952 (CEPEC, HUEFS, NY); Itapebi, estrada para o distrito de Caubi, ca. 7 km da BR 101, Fazenda Palmeiras, ca. 10.5 km na entrada, 15°55'36"S, 39°38'09"W, 04 Nov 2001 (fl.), J. G. Jardim & R. V. Lopes 3954 (HUEFS, NY); Una, Reserva Biológica de Una (REBIO de Una), entrada ca. 45 km S de Ilhéus, margem da estrada que leva à sede da reserva, 15°10'46"S, 39°03'50"W, 13 Jan 2001 (fr.), F. Juchum & E. Forero 116 (CEPEC, NY, RB); Vitória da Conquista, Reserva do Poço Escuro, 26 Nov 2011 (fl.), L. C. Marinho et al. 218 (HUEFS); Camacan, trilha da Bapeba, 15°23'30"S, 39°33'35"W, 02 Apr 2009 (fr.), R. de O. Perdiz et al. 357 (CEPEC); Caravelas, rodovia BR 418, a 27 km SW de Alcobaça, 16 Sep 1978 (fr.), T. S. dos Santos et al. 3361 (CEPEC). Espírito Santo: Marilândia, Liberdade (Água Viva, Pedra do Cruzeiro), prop.: Aguilar A. Lovucini, 18 Jan 2006 (fl., fr.), V. Demuner et al. 1626 (MBML, UB); Conceição da Barra, próximo à Itaúnas, 18°25'41"S, 39°42'56"W, alt. 10 m, 30 Oct 2014 (fr.), J. E. Q. Faria & T. N. C. Vasconcelos 4231 (UB); Linhares, Reserva Natural da Companhia Vale do Rio Doce, Aceiro Aracruz, primeira elevação após o entroncamento das 3 reservas, CVRD, Sooretama e Aracruz-Fazenda Calliman, 31 Oct 2007 (st.), F. L. R. Filardi 776 (RB); Reserva Natural Vale, estrada Farinha Seca, RFL-001/80, Bloco E, Trat 1, 30 Oct 2010 (fl.), D. A. Folli 5407 (CVRD, ESA); Estrada Gávea, 30 Oct 2003 (fl.), D. A. Folli 4659 (CVRD, ESA); Piuma, Apr 1993 (fr.), Helder José s. n. (SPF 77169); Santa Maria de Jetiba, Rio nove, Sítio de L. Kollmann, 26 Jan 2004 (fl.), L. Kollmann 6361 (BHCB, MBML, UB); Santa Teresa, Reserva Biológica Augusto Ruschi, 05 Dec 2002 (fl.), L. Kollmann & E. Bausen 5823 (MBML); Santa Teresa, Nova Lombardia, Reserva Biológica Augusto Ruschi. Altitude 800 m, 28 Nov 2001 (fl.), L. Kollmann et al. 5072 (MBML); Itaúnas, área da Fíbria com plantação de eucalipto, 18°29'27"S, 39°44'12"W, 21 Oct 2018 (fl., fr.), C. A. P. Toledo & N. C. Bígio 399 (ESA); Estrada para Lombardia, 25 Apr 2002 (fr.), R. R. Vervloet & E. Bausen 194 (MBML, UB); Trilha antiga, sede lado direiro, 26 Mar 2003 (fr.), R. R. Vervloet & E. Bausen 2053 (MBML, UB).
Rourea bahiensis is morphologically similar to R. prostrata due to their narrowly elliptic or oblong leaflets usually measuring 0.9–2.2 × 0.5–1 cm. However, they are differentiated because R. bahiensis is a lianescent species without glandular trichomes, while R. prostrata is a prostrate subshrub with glandular trichomes. Rourea bahiensis can also be mistaken for R. discolor, from which it mainly differs by the smaller leaflets (1.1–2.2(–2.4) × 0.7–1 cm) and inflorescence rachis 0.3–1.7(–3.7) cm long vs. larger leaflets ((1.3–)2.2–4.5(–5.8) × (0.8–)1.2 × 1.7(–2.3) cm) and inflorescence rachis 3.5–11.8 cm long in R. discolor. Additionally, the petiole and leaf rachis are subglabrous to villous and the fruits are smaller (1.1–1.3 × 0.4–0.5 cm) in R. bahiensis, while, in R. discolor, the petiole and leaf rachis are glabrous and the fruits are larger (1.2–1.7 × 0.4–0.6 cm).
This species varies considerably in the characteristics of leaflet size, indumentum and texture. Some specimens, for example, have larger and chartaceous leaflets, which are usually sparsely villous abaxially; the opposite of this combination is composed of specimens with smaller, coriaceous and glabrous leaflets. This seems a common variation in the species probably related to branch and leaf development as few materials were found with the two conditions mentioned above (e.g. J. G. Jardim et al. 3952). Additionally, deciduousness of trichomes may explain why some leaf blades are glabrous and others, sparsely villous.
Brazil. Minas Gerais: Grão Mogol, cerrado na estrada para o rio Ventania, ca. 16°32'S–42°49'W, ca. 900 m alt., 5 Nov 1990 (fl.), J. R. Pirani CFCR13358 (Holotype: SPF barcode SPF 69503!; isotypes: ESA!, NY!).
Shrubs , ca. 1.5 m tall; branchlets glabrous or subglabrous, lenticels absent. Leaves 7–11-foliolate, congested; petiole 0.8–1.7 cm long, glabrous or subglabrous, eglandular; rachis 3.5–4.4 cm long, glabrous or subglabrous, eglandular; leaflets opposite to subopposite, subsessile; blade of the basal pair of leaflets 1–1.6 × 0.6–0.9 cm, ovate, others 1.3–3.2 × 0.8–1.4 cm, narrowly ovate or narrowly elliptic, chartaceous, discolorous, glabrous on both surfaces, abaxially vinaceous, adaxially greyish, slightly shining, base symmetric or slightly asymmetric, subcordate, apex obtuse, rounded or narrowly rounded, margin slightly revolute, glabrous; midvein abaxially prominent, adaxially slightly impressed, secondary veins 5–7 pairs, slightly prominent on both surfaces, tertiary veins slightly prominent on both surfaces. Inflorescences in axillary or pseudoterminal cymes; bracts 2–3 mm long; peduncle 0.2–3.5 cm long, glabrous or subglabrous, eglandular; rachis 0.7–1.8 cm long, glabrous or subglabrous, eglandular. Flowers loosely disposed or congested apically; buds 4–3 × 3 mm, orbicular; pedicel 6–12 mm long, eglandular, 2 bracteoles located up to the lower half, persistent; sepals 4–4.5 × 2 mm, chartaceous, ovate or narrowly ovate, outer surface subglabrous, eglandular, inner surface glabrous or subglabrous, margin ciliate, more densely at the apex; petals 5.5–6 × 2 mm, oblong or narrowly obovate, glabrous on both surfaces; stamens connate at base by ca. 1 mm, shorter series ca. 3.5 mm long, longer series 5–5.5 mm long, glabrous; ovary 1–1.2 mm long, densely hirsute only on one side, glabrous or almost so elsewhere, style ca. 2 mm long, sparsely hirsute at base, glabrescent towards the apex, stigma peltate, bilobate. Fruits unknown.
This species is only known from the type location (Fig.
Rourea barbata is mainly recognised by the glabrous leaflets and the ovary, which is hairy only on one side of the structure. It is similar to R. martiana due to the number, size and shape of leaflets, but these are glabrous in R. barbata and hirsute or villous in the latter.
Eichleria blanchetiana Progel, in Martius, Fl. Bras. 12(2): 518. 1877.
Brazil. Bahia: S. d. (fl., fr.), J. S. Blanchet 1050 (Lectotype: BR barcode BR 00000528168!, designated here; isolectotypes: G!, S!, W!).
Lianas : branchlets sparsely hirsute to hirsute, lenticels abundant, inconspicuous. Leaves 27–39-foliolate, loosely disposed; petiole 1.4–2.2 cm long, sparsely hirsute to hirsute, with glandular trichomes; rachis (8–)10–14.5 cm long, sparsely hirsute to hirsute, with glandular trichomes; leaflets subopposite to alternate, pulvinulus ca. 1 mm long; blade of the basal pair of leaflets 0.9–1.5 × 0.6–0.9 cm, orbicular or oblong, others 1.3–2.9 × 0.6–1 cm, oblong, the apical ones elliptic, membranaceous to subchartaceous, discolorous, abaxially glabrous, subglabrous or sparsely hirsute on the midvein, glaucous, adaxially glabrous, dull, base symmetric or slightly asymmetric, rounded or subcordate, obtuse in the apical leaflet, apex rounded, rarely truncate, obtuse in the apical leaflet, margin flat, glabrous; midvein abaxially slightly prominent, rarely prominent, adaxially slightly impressed, rarely impressed, secondary veins 5–7 pairs, abaxially slightly prominent or flat, adaxially flat, tertiary veins flat on both surfaces. Inflorescences in axillary cymes; bracts ca. 1 mm long; peduncle (2–) 3.5–6.7 cm long, densely hirsute, with glandular trichomes; rachis 0.5–2.2 cm long, densely hirsute, with glandular trichomes. Flowers congested apically; buds 3–6 × 2–3 mm, elliptic; pedicel 8–13 mm long, with glandular trichomes, 1–2 bracteoles located in the middle portion, deciduous; sepals 4–6 × 1–1.5 mm, chartaceous, lanceolate, outer surface hirsute, with glandular trichomes, inner surface subglabrous, margin ciliate; petals 9–14 × 2 mm, oblong or narrowly obovate, glabrous on both surfaces; stamens connate at base by ca. 1 mm, shorter series ca. 1 mm long, longer series ca. 2 mm long, with sparse glandular trichomes; ovary ca. 1.2 mm long, hirsute, style ca. 2.5 mm long, sparsely hirsute, subglabrous or glabrous only at the apex, stigma peltate, bilobate. Fruits 1.2 × 0.6–0.7 cm, colour not seen, outer surface sparsely hirsute, inner surface not seen, apex acuminate, style deciduous, calyx covering one third of the fruit; seeds ca. 1 × 0.4 cm, arillode colour not seen.
Most of the known specimens of R. blanchetiana are old collections with no precise locations. The most recently analysed specimen was collected in the municipality of Nilo Peçanha, which is located in southern Bahia (Fig.
Brazil. Bahia: Locality unknown: Aug 1835 (fl., fr.), J. S. Blanchet s. n. (NY barcode NY00393553); s. d. (fl.), J. S. Blanchet s. n. (?) (P barcode P05487855). Nilo Peçanha, estrada a ca. 4 km da comunidade Quilombola de Jatimane na estrada para Ituberá, fazenda Outeiro do Chapeú, 13°40'06"S, 39°04'50"W, 14 Apr 2012 (st.), L. P. de Queiroz & F. H. F. Nascimento 15452 (HUEFS); Locality unknown, s. d. (fl.), J. S. Blanchet 297 (P barcode P05487854); s. d. (fl.), P. Salzmann s. n. (MO 1704495, P barcode P05487856).
Rourea blanchetiana is easily recognised by the leaves with 27–39 leaflets, which are usually membranaceous, oblong and abaxially glaucous, aside from the flowers congested in the inflorescences, comparatively larger peduncle and petals 9–14 mm long. It is similar to R. discolor due to the leaflets abaxially glaucous and pedicel relatively long, but differs by the hirsute inflorescence rachis, elliptic flower buds and petals 9–14 mm long vs. glabrous or subglabrous inflorescence rachis, orbicular or ovate flower buds and petals (4–)6–8 mm long.
In the protologue of the basionym of Rourea blanchetiana from Flora Brasiliensis, the only specimen cited by
Rourea blanchetiana was originally described in Oxalidaceae (
Brazil. Goiás: Chemin du Rio Paranauá á Chico Lobo, dans les campos, 08 Nov 1894 (fr.), A. F. M. Glaziou 20871 (Lectotype: P barcode P02274085!, designated here; isolectotypes: F!-frag., G, K!, MPU!, P!, R!, RB!, S!).
Subshrubs erect, 0.35–0.65(–0.8) m tall; branchlets densely velutinous, lenticels absent. Leaves 9–17-foliolate, loosely disposed; petiole 0.5–2 cm long, velutinous, with glandular trichomes; rachis 4.5–10 cm long, velutinous, with glandular trichomes; leaflets opposite to subopposite, sessile; blade of the basal pair of leaflets (0.9–)1.2–1.8 × (0.4–)0.8–1.6 cm, orbicular or ovate, others 1.6–3.7 × 0.9–1.6 cm, ovate, narrowly elliptic or narrowly ovate, the apical ones usually elliptic, coriaceous, discolorous, abaxially hirsute to densely hirsute, brownish or greenish, adaxially sparsely hirsute to hirsute, dull, base symmetric or slightly asymmetric, cordate, subcordate or rounded, apex obtuse or rounded, margin flat or slightly revolute, ciliate; midvein abaxially prominent, adaxially flat, secondary veins 4–6 pairs, abaxially prominent or slightly prominent, adaxially flat or slightly prominent, tertiary veins abaxially slightly prominent, adaxially flat or slightly prominent. Inflorescences in axillary or terminal determinate thyrses or panicles; bracts ca. 3 mm long; peduncle 0.7–3 cm long, densely hirsute, with glandular trichomes; rachis 4–9.5 cm long, densely hirsute, with glandular trichomes; lateral branches 0.7–2(–3) cm long, densely hirsute, with glandular trichomes. Flowers loosely disposed; buds 4–7 × 3–4 mm, elliptic or broadly elliptic; pedicel 1–4 mm long, with glandular trichomes, 2 bracteoles located up to the lower half, deciduous or persistent; sepals (5–)6–8 × 1.5–2.5 mm, coriaceous, ovate or narrowly elliptic, outer surface densely velutinous or densely hirsute, with glandular trichomes, inner surface subglabrous, margin ciliate; petals 7–9 × 2–3 mm, narrowly elliptic or narrowly obovate, with sparse glandular trichomes on both surfaces; stamens connate at base by ca. 0.8 mm, shorter series 3–5 mm long, longer series 4–6 mm long, with sparse glandular trichomes; ovary 1–1.3 mm long, densely hirsute, style 2–4 mm long, hirsute, stigma peltate, bilobate. Fruits 1–1.4 × 0.4–0.6 cm, reddish or orangish, outer surface completely velutinous, inner surface subglabrous, apex acuminate, style partially persistent, calyx covering one third or rarely half of the fruit; seeds 0.7–1 × 0.4 cm, arillode yellowish.
Rourea chrysomalla is apparently restricted to Distrito Federal (DF), in the midwest region of Brazil (Fig.
In DF, individuals of R. chrysomalla can be found in the districts of Brasília, Gama, Riacho Fundo, Sobradinho and Taguatinga. This species is a subshrub up to 65(–80) cm tall, occurring in the central Brazilian Cerrado, more specifically in areas of cerrado s. s. or “campo sujo”. Rourea chrysomalla is apparently the only species of the genus in which the roots develop a xylopodium. Specimens have been collected with flowers from August to October and in April and with fruits from September to October.
Brazil. Distrito Federal: Sobradinho, 10 Apr 1974 (fl.), E. P. Heringer 13232 (UB); Taguatinga, Brasília, 15 Aug 1964 (fl.), E. P. Heringer 9750 (UB, US); Brasília, ca. 15 km E. of Brasília, 30 Oct 1964 (fl.), H. S. Irwin & T. D. Soderstrom 5724 (NY); Disturbed areas in cerrado, ca. 32 km S.W. of Brasília on road to Anápolis, 04 Sep 1964 (fl.), H. S. Irwin & T. D. Soderstrom 6001 (NY, P, UB, US); Riacho Fundo, 15 Oct 1999 (fl.), L. C. Milhomens et al. 03 (UB); Riacho Fundo, (fl.), L. C. Milhomens et al. 04 (UB); A ca. de 25 km sudoeste de Brasília, caminho para Anápolis, 15 Oct 1999 (fl.), L. C. Milhomens & W. R. Anderson 05 (HUEG, UB); Coletada em campo sujo de Cerrado, c/ intensa ação antrópica, 15 Oct 1999 (fl.), L. C. Milhomens 06 (EAC, HUEG, HUFU, HUTO, UB); Riacho Fundo, (st.), L. C. Milhomens et al. 07 (UB); Coletada em campo sujo de Cerrado, c/ intensa ação antrópica, 15 Oct 1999 (fl.), L. C. Milhomens 08 (HUTO, UB); CINDACTA, 05 Oct 1999 (fr.), L. C. Milhomens et al. 09 (UB); CINDACTA, 05 Oct 1999 (fr.), L. C. Milhomens et al. 10 (UB); CINDACTA, -16.01666705, -48.066667, 05 Oct 1999 (fr.), L. C. Milhomens et al. 11 (UB); CINDACTA, 05 Oct 1999 (fr.), L. C. Milhomens et al. 12 (UB); CINDACTA, 05 Oct 1999 (fr.), L. C. Milhomens et al. 13 (UB); CINDACTA, 05 Oct 1999 (fr.), L. C. Milhomens et al. 14 (UB); CINDACTA, 05 Oct 1999 (fr.), L. C. Milhomens et al. 15 (UB); Gama, área pertencente ao CINDACTA, pouco depois do balão de entrada do Gama, 16°01'S, 48°04'W, 05 Oct 1999 (fr.), L. C. Milhomens et al. 16 (EAC, UB); Fazenda Sucupira, áreas nativas a Oeste da sede do Laboratório-BBGA, 15°52'S, 48°00'W, 08 Nov 1996 (fr.), R. V. Nunes et al. 59 (CEN); Riacho Fundo, 25 Sep 1998 (st.), C. E. B. Proença 2063 (UB); Riacho Fundo, (st.), C. E. B. Proença 2064 (UB); Riacho Fundo, (st.), C. E. B. Proença 2065 (UB); Riacho Fundo, (fr.), C. E. B. Proença 2066 (UB); Riacho Fundo, (fr.), C. E. B. Proença 2067 (UB); Samambaia, Parque Boca da Mata do lado esquerdo da polícia, 15°52'S, 48°03'W, 07 Aug 1995 (fl.), J. M. de Rezende 49 (CEN); Cerrado senso stricto, estrada de terra na saída da cidade, 15°59'31"S, 48°02'24"W, 10 Oct 2017 (fl.), C. A. P. Toledo & J. R. L. da Paz 347 (ESA).
Rourea chrysomalla is easily distinguished by the combination of the following characters: branchlets velutinous, leaflets sessile, coriaceous, abaxially densely hirsute, sepals coriaceous, petals with glandular trichomes and fruits with outer surface completely velutinous. This species can be confused with R. prostrata due to their sub-shrubby habit; however, R. chrysomalla is an erect subshrub (vs. prostrate subshrub), has coriaceous leaflets (vs. chartaceous), inflorescences usually terminal (vs. axillary) and fruits measuring 1–1.4 × 0.4–0.6 cm, completely velutinous externally (vs. fruits 0.8–1 × 0.3–0.4 cm, sparsely hirsute especially at apex). Rourea chrysomalla is also similar to R. glazioui, but differs by the subshrubby habit, coriaceous leaflets and petals and stamens with glandular trichomes vs. lianescent habit, chartaceous leaflets and petals and stamens eglandular.
Rourea chrysomalla was described by
Brazil. Minas Gerais: S. d., F. Sellow s. n. (Holotype: B†). Brazil. Minas Gerais: Lagoa Santa, s. d. (fl.), J. E. B. Warming 1849 (Lectotype: K barcode K 000633716!, designated by
Shrubs or scandent shrubs, 1–2.5 m tall; branchlets hirsute to glabrescent, lenticels abundant, inconspicuous. Leaves 9–13-foliolate, loosely disposed; petiole 1.9–2.8 cm long, sparsely hirsute to hirsute or sparsely villous, with glandular trichomes; rachis 4–11 cm long, sparsely hirsute to hirsute or sparsely villous, with glandular trichomes; leaflets opposite to alternate, pulvinulus ca. 1 mm long; blade of the basal pair of leaflets 2.3–4.7 × 1.3–2 cm, ovate, elliptic or oblong, others 4–7.2 × 1.6–3.2 cm, narrowly ovate, oblong or narrowly elliptic, the apical ones always elliptic or narrowly elliptic, chartaceous, slightly discolorous, abaxially hirsute or villous, occasionally subglabrous, more densely in the midvein, brownish or greenish, adaxially glabrous or subglabrous, usually sparsely villous on midvein, slightly shining or dull, base slightly asymmetric to asymmetric, usually symmetric in the apical leaflet, rounded, cordate or subcordate, occasionally acute in the apical leaflet, apex obtuse, acute or narrowly rounded, margin flat, rarely slightly revolute, ciliate or sparsely ciliate; midvein abaxially prominent or slightly prominent, adaxially impressed or slightly impressed, secondary veins 6–7 pairs, abaxially slightly prominent, adaxially flat, tertiary veins abaxially slightly prominent or flat, adaxially flat or slightly prominent. Inflorescences in axillary cymes, rarely pseudoterminal; bracts 2–3 mm long; peduncle 2.8–8 cm long, hirsute, with glandular trichomes; rachis 0.8–1.9 cm long, hirsute, with glandular trichomes. Flowers congested apically; buds 2.5–4 × 2–3 mm, orbicular or broadly elliptic; pedicel 3–5 mm long, with glandular trichomes, 2 bracteoles located up to the lower third, deciduous; sepals 4–5 × 2–2.5 mm, chartaceous, ovate, outer surface hirsute, with glandular trichomes, inner surface subglabrous or sparsely sericeous, margin ciliate; petals 7–8 × 2–3 mm, narrowly obovate or narrowly elliptic, glabrous on both surfaces; stamens connate at base by ca. 1.5 mm, shorter series ca. 1.5 mm long, longer series ca. 2.5 mm long, glabrous; ovary 1–1.3 mm long, densely hirsute, style 2–4 mm long, hirsute, stigma peltate, bilobate. Fruits 1.3–1.4 × 0.4–0.5 cm, orangish, outer surface subglabrous, sparsely hirsute at the apex, inner surface glabrous or subglabrous, apex acuminate, style partially persistent, calyx covering one third of the fruit; seeds 0.9–1 × 0.4 cm, arillode colour not seen.
There are only few records of this species, which seems to be restricted to central and northeastern Minas Gerais (Fig.
Brazil. Minas Gerais: Rio Doce, localidade Figueira, 11 Sep 1930 (fl.), J. G. Kuhlmann 348 (IAN, RB); Matozinhos: fazenda Cauaia, 31 Oct 1996 (fr.), J. A. Lonbardi 1453 (BHCB); Fazenda Castelo da Jagoara, 19°28'12.0"S, 43°58'59.1"W, 683 m alt., 21 Oct 2006 (fr.), J. C. F. Melo et al. 514 (BHCB, SPF). Vespasiano, região metropolitana de Belo Horizonte, afloramento calcário, adjacente à Lavra da Cia de Cimento Portland Itaú, Dec 1990 (fr.), M. A. L. Rollo 37 (SPF); Serra do Cipó, Aug 1895 (fl.), Senna s. n. (Herb. Schwacke 11747) (NY, P, RB); Lagoa Santa, s. d. (fl.), E. Warming s. n. (P).
Rourea cnestidifolia is recognised by the presence of glandular trichomes, relatively large middle and apical leaflets (4–7.2 × 1.6–3.2 cm), obtuse, acute or narrowly-rounded leaflet apex, a long peduncle (2.8–8 cm long) and a short pedicel (3–5 mm long).
The morphological limits separating Rourea cnestidifolia and R. glazioui present slight discontinuities, but these, along with distribution patterns, are sufficient to distinguish them. They are similar in the presence of glandular trichomes on petiole, leaf rachis and inflorescences, leaflet size and shape and in overall characteristics of flowers and fruits.
Brazil. Bahia: Itatim, interior da mata da base do Inselberg, 12°45'12"S, 39°46'59"W, 26 Jan 1997 (fl.), E. Melo et al. 1985 (Holotype: ESA 84255!; isotypes: HUEFS!, UEC!, VIC!).
Akin to R. martiana due to the presence of glandular trichomes, relatively small leaves and leaflets and flowers and fruits with similar characteristics, but differs by the leaves 5–9(–13)-foliolate (vs. 9–15-foliolate), leaflet apices narrowly rounded or obtuse (vs. rounded) and pedicels 5–13 mm long (vs. ca. 2 mm long).
Lianas , shrubs or scandent shrubs, rarely treelets, 3–4 m tall; branchlets subglabrous or sparsely pubescent, lenticels abundant, conspicuous. Leaves 5–9(–13)-foliolate, congested; petiole 1.3–2.2 cm long, sparsely hirsute to glabrescent, eglandular; rachis 3–6(–8.5) cm long, sparsely hirsute to glabrescent, eglandular; leaflets opposite to subopposite, pulvinulus ca. 1 mm long; blade of the basal pair of leaflets 1.4–2 × 0.9–1.4 cm, ovate, others 2–4.5(–5.8) × (0.8–)1.2–1.7(–2.2) cm, narrowly ovate, rarely oblong, chartaceous, occasionally membranaceous, slightly discolorous, abaxially hirsute or villous, brownish or greenish, adaxially subglabrous, dull, base slightly asymmetric, rounded or subcordate, rarely obtuse, apex narrowly rounded or obtuse, margin flat or slightly revolute, ciliate; midvein abaxially prominent, adaxially flat or slightly impressed, secondary veins 5–7 pairs, abaxially slightly prominent, adaxially flat, tertiary veins abaxially slightly prominent, adaxially flat or slightly prominent. Inflorescences in pseudoterminal cymes, rarely ramiflorous; bracts 1.5–2.5 mm long; peduncle 0.8–1.7 cm long, sparsely hirsute, eglandular; rachis 1–2.5 cm long, sparsely hirsute, eglandular. Flowers loosely disposed; buds not seen; pedicel 5–13 mm long, with glandular trichomes, 2 bracteoles located up the lower half, persistent; sepals 4.5–5 × 2–3 mm, chartaceous, ovate, outer surface pubescent, with glandular trichomes, inner surface sericeous, margin ciliate; petals 7–8 × 2.5–3 mm, narrowly obovate, glabrous on both surfaces; stamens connate at base by ca. 1 mm, shorter series 2–3 mm long, longer series 3–4 mm long, glabrous; ovary ca. 1 mm long, densely hirsute, style ca. 4 mm long, sparsely hirsute, stigma peltate, bilobate. Fruits 1.1–1.4 × 0.6–0.7 cm, yellowish or orangish, outer surface subglabrous, sparsely hirsute at the apex, inner surface subglabrous, apex acuminate, style partially persistent, calyx covering one third of the fruit; seeds 0.7–0.9 × 0.4–0.5 cm, arillode colour not seen.
Rourea diamantina: A flowering branchlet B leaf, abaxial surface C indumentum, leaflet abaxial surface D flower, external view E flower, internal view F stamens G ovary, external view H ovary, internal view and ovules I fruit and seed, external view J seed, external view K sepal indumentum, external view.
Rourea diamantina is only known from the east side of Chapada Diamantina, a mountain range of about 41,700 km2 and approximately 2,000 m altitude, located in the centre of Bahia (Fig.
Brazil. Bahia: Estrada para o Riacho do Meio, 12°18'18"S, 40°29'11"W, 07 Feb 2005 (fr.), D. Cardoso 242 (CEPEC, HUEFS, NY); Itaberaba, Fazenda Itaberaba, ilhas de vegetação em Inselbergs, 12°30'06"S, 40°05'03"W, 08 Feb 2007 (fr.), J. L. Ferreira et al. 301 (HUEFS); Morro do Agenor, 12°42'S, 39°46'W, 26 Nov 1995 (fl.), F. França et al. 1482 (HUEFS); Morro das Tocas: 12°43'S, 39°42'W, 28 Sep 1996 (fl.), F. França et al. 1844 (ALCB, HUEFS, SPF); 29 Sep 1996 (fl.), F. França et al. 1866 (HUEFS, SPF). Mucugê, Chapada Diamantina, caminho para Marimbus, 14 Dec 2013 (fr.), M. K. Guedes et al. 21064 (ALCB); Chapada Diamantina, Marimbus, 12°76'30"S, 41°30'91"W, 14 Nov 2014 (fr.), M. K. Guedes et al. 23112 (ALCB, MBML); Rodovia BR 116, Feira de Santana, Milagres, 12°43'S, 39°42'W, 24 Nov 2001 (fr.), J. G. Jardim 3973 (CEPEC, HUEFS); Morro do Agenor ou da Madeira, 12°43'S, 39°42'W, 17 Dec 1995 (fl.), E. Melo et al. 1409 (ALCB, HUEFS); Morro da Torre, 12°43'S, 39°42'W, 09 Nov 1996 (fr.), E. Melo et al. 1832 (ESA, HUEFS, RB); Itatim, interior da mata da base do Inselberg, 12°45'12"S, 39°46'59"W. 26 Jan 1997 (fr.), E. Melo et al. 1981 (ESA, HUEFS, UEC); Andarai, Alagados Marimbus, 12°45'55"S, 41°18'52"W, 07 Dec 2012 (fr.), E. Melo et al. 11815 (HUEFS); Rui Barbosa, Serra do Orobó, base da encosta da serra, 12°18'S, 40°29'W, 18 Dec 2004 (fl.), L. P. de Queiroz et al. 9894 (HUEFS); Machado Portello, 23 Jul 1915 (fr.), J. N. Rose & P. G. Russel 19932 (NY, US); Cachoeira, 03 Jan 1977 (fr.), P. de Souza s. n. (ALCB, CEPEC).
The specific epithet “diamantina” refers to Chapada Diamantina (Bahia, Brazil), where the new species is presumed to be endemic. This epithet is a noun in apposition (
Rourea diamantina is recognised by the leaves 5–9(–13)-foliolate, leaflets abaxially hirsute or villous, pedicel with glandular trichomes and sepals with indumentum sericeous internally. An interesting characteristic is the leaves whose leaflets become significantly larger towards the apex. The new species is similar to R. martiana, but differs by the reduced number of leaflets (usually 5–9), which are normally narrowly ovate with obtuse or narrowly-rounded apex, and longer pedicel (5–13 mm long) vs. leaves 9–15-foliolate, leaflets normally oblong or narrowly elliptic with rounded apex and a shorter pedicel (ca. 2 mm long). Additionally, both species are geographically isolated by the Chapada Diamantina (Fig.
Some specimens, cited here under Rourea diamantina, were previously identified as R. martiana by
Santalodes discolor (Baker) Kuntze, Revis. Gen. Pl. 1: 155. 1891.
Eichleria lucida
Progel, in Martius Fl. Bras. 12(2): 1877. Rourea progeliana Kuhlm., Arq. Inst. Biol. Veg. 1: 40. 1934. Type. Brazil. Bahia: S. d. (fl.), J. S. Blanchet 3145A (Lectotype: P barcode P 02274093!, designated by
Brazil. Bahia: Ilheos, 04 Sep 1839 (fl.), B. Luschnath s. n. (Holotype: BR barcode BR 697465!).
Lianas or scandent shrubs, 2–3 m tall; branchlets glabrous, lenticels sparse or abundant, conspicuous or inconspicuous. Leaves 9–25(–29)-foliolate, loosely disposed; petiole 1.7–4 cm long, glabrous or subglabrous, rarely sparsely villous, eglandular; rachis 6.7–12.5(–18) cm long, glabrous or subglabrous, rarely sparsely villous, eglandular; leaflets opposite to subopposite, pulvinulus 1–2 mm long; blade of the basal pair of leaflets 1.3–2.7(–3.3) × 0.8–1.6 cm, elliptic, narrowly elliptic, oblong or narrowly ovate, others 1.8–4.5(–5.8) × 0.8–1.7(–2.3) cm, narrowly elliptic, oblong or narrowly obovate, apical ones usually elliptic, chartaceous or subcoriaceous, discolorous, abaxially glabrous, sparsely puberulous, rarely pubescent, glaucous, occasionally greenish, adaxially glabrous, dull or shinning, base symmetric or slightly asymmetric, cordate, subcordate, occasionally truncate, sometimes obtuse in the apical leaflet, apex rounded, occasionally slightly obtuse, margin flat or revolute, glabrous; midvein abaxially prominent, adaxially flat, secondary veins 6–8 pairs, abaxially flat, adaxially slightly prominent, tertiary veins abaxially flat, adaxially slightly prominent. Inflorescences in axillary or pseudoterminal cymes or panicles; bracts ca. 1 mm long; peduncle 0.2–2.7 cm long, glabrous or subglabrous, eglandular; rachis 3.5–11.5 cm long, glabrous or subglabrous, eglandular; lateral branches 2.2–9.5 cm long, glabrous or subglabrous, eglandular. Flowers loosely disposed; buds 2–3 × 2–3 mm, orbicular or ovate; pedicel 6–16 mm long, eglandular, 1–2 bracteoles located up the lower half, deciduous; sepals (3.5–)4.5–5.5 × 2–2.5 mm, chartaceous, ovate, outer surface glabrous, pubescent only at the apex, eglandular, inner surface glabrous, margin glabrous or ciliate; petals (4–)6–8 × 2–2.5 mm, narrowly obovate, glabrous on both surfaces; stamens connate at base by ca. 1 mm, shorter series ca. 2.5 mm long, longer series ca. 3.5 mm long, glabrous; ovary ca. 1 mm long, densely hirsute, style ca. 1 mm long, sparsely hirsute, stigma peltate, bilobate. Fruits 1.2–1.7 × 0.4–0.6 cm, orangish or reddish, outer surface glabrous or subglabrous, sparsely hirsute only at the apex, inner surface glabrous, apex acuminate, style partially persistent or deciduous, calyx covering one third of the fruit; seeds ca. 1.3 × 0.5 cm, arillode yellowish.
Rourea discolor is exclusive to Bahia, where the individuals are distributed mainly in the southern coastal zone (Fig.
Brazil. Bahia: Estrada que liga Serra Grande/Itacaré, coletas a 8 km partindo da Serra Grande, 26 Aug 1992 (fl.), A. M. Amorim 671 (CEPEC, HUEFS, NY); Reserva Biológica do Mico-Leão (IBAMA), estrada no km 48 da Rod. BA-001 Ilhéus/Una, região da mata higrófila Sul Baiana, 15°09'S, 39°05'W, 18 Aug 1997 (st.), A. M. Amorim et al. 2069 (CEPEC); Jussari, RPPN Serra do Teimoso, rodovia Jussari-Palmira, estrada ca. 7.5 km de Jussari, 15°09'16"S, 39°31'52"W, A. M. Amorim et al. 4135 (CEPEC); 10 km S de Pontal (Ilhéus), camino a Olivença, local de extraccion de arena, aprox. 14°54'S, 39°02'W, 04 Dec 1992 (fr.), M. M. Arbo et al. 5559 (SPF); Reserva Biológica de Una, estrada no km 46 da Rodovia BA-001, Ilhéus/Una, estrada principal para a sede, trilha piedade, 15°09'S, 39°05'W, 10 Sep 2006 (fl.), A. M. Amorim et al. 6274 (CEPEC, NY, SPF); Valença, estrada para Orobó, com entrada no km 3 da estrada Valença/BR 101, coletas entre o km 3–10 do ramal para Orobó, 07 Feb 1983 (fr.), A. M. de Carvalho & T. Plowan 1506 (CEPEC); Distrito de Serra Grande, 7.3 km na estrada Serra Grande/Itacaré, Fazenda Lagoa do Conjunto Fazenda Santa Cruz, 14°25'S, 30°01'W, 11 Nov 1991 (fl.), A. M. de Carvalho et al. 3512 (ALCB, CEPEC, HUEFS, NY, US); Olivença, mata do Balneário Tararomba, 15°26'S, 39°06'W, 17 Sep 2016 (fl.), M. L. Guedes et al. 24980 (ALCB); Rod. BA-001 Ilhéus/Una ca. 50,5 km de Ilhéus, área de influência da REBIO de Una, 12 Aug 2000 (fl.), J. G. Jardim et al. 3094 (CEPEC, NY, RB); Distrito de Serra Grande, Faz. Lagoa do Conjunto e Conjunto Faz. Santa Cruz, ramal que dá acesso à sede da fazenda, ca. 300 m da rodovia, 07 Jan 2000 (fr.), F. do S. Juchum et al. 09 (CEPEC, NY); Porto Seguro, 02 Sep 1961 (fl.), A. P. Duarte 6118 (NY, RB, US); Una, Reserva Biológica da Una (REBIO da Una), estrada ca. 45 km S de Ilhéus, margem da estrada que lava à sede da reserva, 15°10'46"S, 39°03'50"W, Jan 2001 (fr.), F. do S. Juchum et al. 117 (CEPEC, NY); Rod. Una-Camandatuba, mata litorânea, solo arenoso na Faz. De Antônio Pimenta, 26 Oct 1971 (fr.), R. S. Pinheiro 1656 (CEPEC, NY); Ilhéus, Sep 1821 (fl.), L. Riedel s. n. (NY barcode NY 00393556); Serra Grande, 25 Aug 1996 (fl.), A. L. B. Sartori et al. 293 (CEPEC, UEC); 3 km north of Rodoviaria, Mata da Esperança, forest north of dam and reservoir, 14°46'55"S, 39°04'09"W, 20 Sep 1994 (fl.), W. W. Thomas et al. 10574 (MBM, NY); Uruçuca, 7.3 km north of Serra Grande on road to Itacaré, Fazenda Lagoa do Conjunto Fazenda Santa Cruz, 14°25'24"S, 39°03'38"W, 15 Nov 1995 (fr.), W. W. Thomas et al. 11015 (CEPEC).
Rourea discolor is recognised by the glabrous or subglabrous inflorescence rachis measuring 3.5–11.5 cm long and pedicel 6–16 mm long. It is morphologically similar to R. glazioui due to the number and shape of its leaflets; however, individuals of R. discolor do not have glandular trichomes and the inflorescence rachis is glabrous or subglabrous, while in R. glazioui, they have glandular trichomes and the inflorescence rachis is hirsute or densely so. Rourea discolor can be confused with R. bahiensis as well, although they are differentiated by the characteristics of the leaflets and inflorescences (see “Recognition and notes” section of R. bahiensis).
In the original description,
Rourea discolor was once treated in Oxalidaceae by
Rourea polyphylla
G. Schellenb., in Engler, Pflanzenreich IV. 127(Heft 103): 197. 1938, nom. illeg., non R. polyphylla
Brazil. Rio de Janeiro: Rezende, 22 Nov 1876 (fr.), A. F. M. Glaziou 8625 (Holotype: B†; lectotype: P barcode P 02274098!, selected by
Lianas or scandent shrubs, 0.9–1.5 m tall; branchlets densely velutinous to glabrescent, lenticels sparse or abundant, conspicuous or inconspicuous. Leaves (9–)15–27-foliolate, loosely disposed; petiole 1.9–3.5(–4.5) cm long, densely velutinous or hirsute, with glandular trichomes; rachis (8–)10–24 cm long, densely velutinous or hirsute, with glandular trichomes; leaflets opposite to alternate, subsessile or pulvinulus ca. 1 mm long; blade of the basal pair of leaflets 1.3–3.3 × (0.8–) 1.2–2.6 cm, ovate, oblong or orbicular, rarely elliptic, others (1.5–)2.6–6.5(–8.2) × (0.8–) 1.3–2.6 cm long, narrowly ovate, narrowly obovate, oblong or narrowly elliptic, rarely elliptic, apical ones usually elliptic, chartaceous, discolorous, abaxially hirsute to densely hirsute, greenish or brownish, adaxially subglabrous to sparsely hirsute, more densely on midvein, dull, base slightly asymmetric to asymmetric, very rarely symmetric, rounded, subcordate, cordate or truncate, rarely obtuse, occasionally acute in the apical leaflet, apex narrowly rounded or obtuse, rarely rounded, occasionally acute in the apical leaflet, margin slightly revolute to revolute, rarely flat, ciliate; midvein abaxially prominent, adaxially slightly impressed, occasionally flat, secondary veins 6–8(–9) pairs, abaxially prominent or slightly prominent, rarely flat, adaxially slightly impressed or flat, tertiary veins abaxially slightly prominent or flat, adaxially slightly impressed or flat. Inflorescences in axillary cymes, rarely panicles; bracts 2–3 mm long; peduncle 0.2–1.7 cm long, hirsute to densely hirsute, with glandular trichomes; rachis 0.3–4(–8) cm long, hirsute to densely hirsute, with glandular trichomes; lateral branches 0.3–1.5(–2.8) cm long, hirsute to densely hirsute, with glandular trichomes. Flowers loosely disposed; buds 3–4 × 2–3 mm, ovate, orbicular or ellipsoid; pedicel 5–10(–14) mm long, with glandular trichomes, 1–2 bracteoles located up the lower third, deciduous or persistent; sepals (4–)4.5–5.5 × 1.5–2 mm, chartaceous, ovate or elliptic, outer surface hirsute or sparsely hirsute, with glandular trichomes, inner surface sericeous or sparsely sericeous, margin ciliate; petals (5–)6–7.5 × 1.5–2 mm, narrowly obovate or oblong, glabrous on both surfaces; stamens connate at base by 0.8–1 mm, shorter series 2.5–4 mm long, longer series 4–5 mm long, glabrous; ovary 1–1.2 mm long, densely hirsute, style (1.5–)4–5.5 mm long, sparsely hirsute, subglabrous or glabrous only at the apex, stigma peltate, bilobate. Fruits 1.1–1.5(–1.6) × 0.5–0.6(–0.8) cm, orangish, reddish or yellowish, outer surface partially or completely hirsute, usually more densely at the apex, inner surface glabrous or subglabrous, apex acuminate or rounded, style partially persistent or deciduous, calyx covering one third of the fruit; seeds 0.9–1.1(–1.3) × 0.3–0.5(–0.6) cm, arillode yellowish.
Rourea glazioui is found in Bahia, Espírito Santo and Rio de Janeiro (Fig.
Brazil. Bahia: Nova Viçosa, ca. 61 km na estrada de Caravelas para Nanuque, 06 Sep 1989 (fr.), A. M. de Carvalho et al. 2499 (CEPEC, MBM); Picadão, extremo Sul, área da Aracruz Celulose, 23 Aug 1993 (fr.), M. L. Guedes 2971 (ALCB, CEPEC); Caravelas, área de influência da CAF, 17°44'07"S, 39°45'16"W, 03 Feb 2002 (fr.), M. L. Guedes 9705 (ALCB); Teixeira de Freitas. BR-101 ca. 11 km da cidade, 17°25'49"S, 39°41'14"W, 18 Jun 2005 (fl.), J. G. Jardim et al. 4620 (CEPEC, HUEFS); Assentamento “Paulo Freire” (MST), ramal com entrada no km 15 da Rodovia Macuri/Itabatan, 2 km antes da sede do assentamento, 04 Oct 2000 (fr.), L. A. Matos-Silva et al. 4140 (ALCB, CEPEC, HUEFS, NY, UESC); Mucuri, 14–17 km a W de Mucuri, 13 Sep 1978 (fl.), S. A. Mori et al. 10436 (CEPEC, NY); Macuri, área de restinga com algumas manchas de campos, a 7 km a NW de Macuri, 14 Sep 1978 (fl., fr.), S. A. Mori et al. 10532 (CEPEC, NY); Nova Viçosa, 3 km após posto da mata, sentido Posta da Mata divisa BA-MG, 08 Nov 1999 (fr.), A. A. Santos et al. 553 (CEN); Vale do Rio Alcobaça, 12 May 1971 (fl.), T. S. dos Santos 1613 (CEPEC, US). Espírito Santo: Boa Esperança, Bela Vista, 18°33'21"S, 40°13'10"W, 115 m alt., 1 Dec 2010 (fr.), A. M. Assis & M. D. S. Demuner 2608 (MBML); Sooretama, REBIO Sooretama, Quirinho, 19°03'14"S, 40°09'35"W, 80 m alt., 2 Nov 2013 (fl.), A. M. Assis et al. 4030 (VIES); Guarapari, Barro Branco, próximo da BR 101, 20°33'11"S, 40°28'39"W, 17 Jul 2018 (fr.), A. M. Assis et al. 4516 (VIES); Reserva Fazenda São Joaquim, 14 Oct 1985 (fr.), H. Q. Boudet & W. Boone 2027 (MBM, RB); Pinheiros, Reserva Biológica do Córrego do Veado, trilha que vai para mata de água limpa, 09 Jul 2010 (fr.), I. S. Broggio 26 (VIES); Guarapari, Parque Natural Municipal Morro da Pescaria, 20.6591S, 40.4731W, 09 Feb 2014 (fl.), A. C. S. Dal Col & J. Rodrigues Filho 265 (VIES); Governador Lindemberg, Mata da Prefeitura, 14 Nov 2006 (fr.), V. Demuner et al. 3069 (MBM, UB); Conceição da Barra. 16 Aug 1965 (fl., fr.), A. P. Duarte 8888 (NY, RB); Entre Linhares e São Matheus, 4 Nov 1953 (fr.), A. P. Duarte & J. C. Gomes 3960 (RB); Comunidade de Lajinha, Fazenda Rancho Tropical II, restinga arbustiva alta com moitas, 05 Jul 2007 (fl., fr.), C. Farney et al. 4764 (RB); Pedro Canário, estradas vicinais, próximas ao eixo da BR 101 entre o Rio Itaúnas e 5 km em direção a Pinheiro, 21 Oct 2008 (fr.), C. Farney et al. 4881 (RB); Reserva Biológica do Córrego Grande, estrada no meio da reserva, 28 Dec 2012 (fr.), T. B. Flores & G. O. Romão 1257 (ESA, RB); Floresta Nacional do Rio Preto, trilha da Lagoa Seca, 29 Aug 2012 (fr.), T. B. Flores & G. O. Romão 1284 (ESA); Presidente Kennedy, 6 Feb 1988 (fl.), J. M. L. Gomes 476 (VIES); Próximo à antiga casa do guarda, estrada Aderne, 04 Jul 1995 (fl.), D. A. Folli 2342 (CEPEC, CVRD, ESA); Próximo ao Rio Barra Seca, estrada Aderne, 06 Oct 1994 (fr.), D. A. Folli 2385 (CEPEC, CVRD, ESA); Jueirana, estrada Aceiro com Eucalipto, 25 Jul 2001 (fl.), D. A. Folli 3996 (CVRD, ESA); BR 101, próximo à entrada para Conc. da Barra, 27 Aug 2007 (fl.), D. A. Folli 5684 (CVRD, ESA); Mata de restinga sobre feixes de cordões arenosos, vegetação localizada à direita da estrada principal da vila de Itúnas, 06 Oct 2007 (fr.), A. O. Giaretta et al. 248 (RB); Vegetação de restinga, mata seca, entrada localizada adjacente à estrada principal da Vila de Itaúnas, área de preservação permanente à PEI, 14 Jun 2008 (fr.), A. O. Giaretta et al. 276 (RB); Jaguaré, Rod. BR-101, 23 Aug 1987 (fr.), G. Hatschbach & A. C. Cervi 51416 (MBM, US); Rod. ES-421, km 5–8, 09 Oct 1998 (fr.), G. Hatschbach et al. 68346 (CEPEC, MBM, US); Itaúnas, 09 Jun 1992 (fl.), O. J. Pereira 3419 (VIES); 20 May 1999 (fl.), G. Hatschbach et al. 69202 (CEPEC, ESA, MBM, SPF, US); Praia Setibana, ES-060 at 6 km E of BR-101, 18 Jan 1993 (fr.), J. A. Kallunki & J. R. Pirani 345 (NY, SPF); Colatina, estrada do Patrimônio, perto de Colatina, 16 May 1934 (fl.), J. G. Kuhlmann 351 (IAN, NY, RB); Reserva Biológica do Córrego Grande, coletado próximo na mata próxima a sede da rebio, 10 Jan 2012 (fr.), L. Marcarini et al. 38 (VIES); Próximo ao Bairro Litorâneo, seguindo uma estrada de terra atrás do campus da Universidade (UFES), 01 Aug 2007 (fr.), R. F. A. Martins et al. 38 (RB); Rodovia do Sol, road linking BR-101 to the São Mateus, Bairro Litorâneo, fragmento de mata ciliar próximo ao campus da universidade, 03 Oct 2009 (fr.), A. G. Oliveira & M. Ribeiro 656 (VIES); Anchieta, Estrada para Castellanos, tipo do morro, 2 Feb 2012 (fl.), N. E. Oliveira Filho 79 (VIES); Mata seca de restinga, 23 Jun 2002 (fl.), O. J. Pereira et al. 3536 (VIES); Área 126 da Aracruz Celulose S. A., 2 Apr 1992 (fr.), O. J. Pereira 4283 (VIES); Serra, Bicanga, 22 Apr 1993 (fl.), O. J. Pereira 4529 (VIES); Itaúnas, área 135 da Aracruz Celulose S. A., 18°25'10"S, 39°42'32"W, 21 Sep 1993 (fr.), O. J. Pereira et al. 4890 (VIES); Interlagos, Rodovia do Sol ES060, 20°19'47"S, 40°17'32"W, 1 Jun 1995 (fr.), O. J. Pereira 5468 (VIES); Itaúnas, 13 Jul 1991 (fr.), P. C. Vinha 1271 (VIES); Linharinho, 6 Nov 1996 (fr.), O. J. Pereira et al. 5726 (VIES); Vila Velha. 20°25'42.7"S, 40°22'46.7"W, 10 Jan 2001 (fl.), O. J. Pereira & E. Espindula 6713 (VIES); Parque Estadual de Itaúnas, 24 Aug 2002 (fr.), O. J. Pereira et al. 6983 (VIES); Serra, Nova Zelândia, 20°10'52"S, 40°12'54"W, 21 Jul 2015 (fr.), O. J. Pereira et al. 8021 (VIES); Linhares, Reserva Natural Vale, aceiro c/ BR 101 jueirana, 21 Aug 2006 (fr.), G. S. Siqueira 240 (CVRD, ESA); Parque Estadual de Itaúnas, Trilha Alméscar, 18.4033S, 39.7019W, 08 Aug 2013 (fr.), W. O. Souza et al. 146 (VIES); Conceição da Barra, Itaúnas, área da Fíbria com plantação de eucalipto, 18°29'27"S, 39°44'12"W, 21 Oct 2018 (fr.), C. A. P. Toledo & N. C. Bígio 400 (ESA); Guarapari, Parque Estadual Paulo César Vinha, 21 Oct 2006 (fr.), R. T. Valadares 304 (VIES); Aracruz, Estação Biológica Marinha Augusto Ruschi, Santa Cruz, 19°58'14"S, 40°08'26"W, 1 Apr 2018 (fr.), Wandekoken et al. 257 (VIES); Parque Ecológico da CST, área de Tabuleiro, Bosque dos Jacarandás, área dominada por espécies exóticas plantadas, 21 Apr 1995 (fl.), I. Weiler Junior et al. 166 (VIES). Rio de Janeiro: Casimiro de Abreu, Morro de S. João, 03 Feb 1970 (fr.), CPJ s. n. (RB 261147); Reserva Biológica do Poço das Antas, mata da Osmarina, 26 May 1982 (fr.), H. C. de Lima & G. Martinelli 1733 (RB); Silva Jardim, Est. Juturnaiba, esquerda – km 5, Reserva Biológica de Poço das Antas, 11 Jan 1994 (fr.), C. Luchiari et al. 349 (RB); Conceição de Macabu, km 12 da BR 101, a 62 km de Campos, 10 Jan 1985 (fr.), J. R. Pirani & D. C. Zappi 1046 (NY, SPF); Horto Florestal de Rezende, s. d. (st.), A. da Silva s. n. (IAN 67552).
Rourea glazioui resembles R. cnestidifolia as they have glandular trichomes and similar characteristics of leaflet shape and size, flowers and fruits. However, the former has leaves (9–)15–27-foliolate, peduncle 0.2–1.5 cm long, flowers loosely disposed on the inflorescences and pedicel 5–10(–14) mm long, while the latter has leaves 9–13-foliolate, peduncle 2.8–8 cm long, flowers congested in the inflorescence apex and pedicel 3–5 mm long. Rourea glazioui is commonly confused with R. chrysomalla in herbarium specimens, but differs in the characteristics described in the “Recognition and notes” section of R. chrysomalla.
In the protologue, Rourea glazioui was named as R. polyphylla (
The type collection of R. glazioui morphologically resembles the type of R. fulgens Planch. (Wallich 8524, deposited in K), a species restricted to Singapore. Both type specimens share densely-velutinous branchlets, multifoliolate leaves, and oblong or narrowly-elliptic leaflets with rounded apex, which are also discolorous and abaxially hirsute. Some other species from south-eastern Asia, such as R. mimosoides (Vahl) Planch., also have multifoliolate leaves with oblong or narrowly-elliptic leaflets, so this raises the question whether Rourea species from the New World are a monophyletic group. Morphological similarities between the multifoliolate species of Rourea from America and south-eastern Asia were firstly noticed by
Brazil. Bahia: Município de Santa Cruz de Cabrália, 2–4 km a W de Sta. Cruz de Cabrália, pela estrada antiga, área de campos e restinga, 21 Oct 1978 (fr.), S. A. Mori 10938 (Holotype: CEPEC barcode CEPEC 15308!; isotypes: COL!, K!, NY!, RB!).
Lianas
or scandent shrubs, ca. 3 m tall; branchlets subglabrous or sparsely pubescent, lenticels abundant, inconspicuous. Leaves 3–7(–9)-foliolate, congested; petiole 1.1–3 cm long, subglabrous, eglandular; rachis 1.5–3.4 cm long, subglabrous, eglandular; leaflets subopposite to alternate, pulvinulus ca. 1 mm long; blade of the basal pair of leaflets 1.1–2.8 × 0.5–1.7 cm, ovate, oblong or elliptic, others 1.6–6(–7.2) × 1.3–2.5(–3.7) cm, elliptic or oblong, rarely ovate, chartaceous, discolorous, glabrous on both surfaces, abaxially brownish or greenish, adaxially dull, base slightly asymmetric or symmetric, cordate, subcordate or rounded, apex rounded, rarely narrowly rounded, margin flat or slightly revolute, glabrous; midvein abaxially prominent, adaxially flat or impressed, secondary veins 6–8 pairs, flat or slightly prominent on both surfaces, tertiary veins abaxially flat, adaxially flat or slightly prominent. Inflorescences in axillary cymes or panicles; bracts 1–2 mm long; peduncle 1.3–2.3 cm long, glabrous or subglabrous, eglandular; rachis 2–4 cm long, glabrous or subglabrous, eglandular; lateral branches 2.4–4.9 cm long, glabrous or subglabrous, eglandular. Flowers unknown, loosely disposed; buds unknown; pedicel 9–18 mm long, eglandular, 1–2 bracteoles located up to the lower half, deciduous; sepals (persistent on fruits) elliptic, outer surface glabrous or subglabrous, eglandular, inner surface glabrous or subglabrous, margin ciliate, more densely at the apex; petals (
Rourea macrocalyx is only known from southern Bahia, occurring in the coastal zone ranging from the municipality of Porto Seguro to Santa Cruz de Cabrália (Fig.
Brazil. Bahia: Porto Seguro, RPPN VERACEL, ramal para Sta. Cruz Cabrália, ca. 10 km do Centro de visitantes, 05 Feb 2000 (fr.), J. G. Jardim & M. Alves 2686 (NY); Santa Cruz Cabrália, 16°18'49"S, 39°1'35"W, 11 Oct 2010 (fr.), B. M. da Silva et al. 24 (HUEFS).
Rourea macrocalyx is morphologically recognised by the leaves with 3–7(–9) leaflets, pedicel measuring 9–18 mm long and the strongly accrescent calyx, which covers two thirds of the fruits. It is similar to R. discolor due to the glabrous leaflets and length of pedicel, but differs mainly by the number of leaflets (3–9 vs. 9–29).
Santalodes martianum (Baker) Kuntze, Revis. Gen. Pl. 1: 155. 1891.
Brazil. Minas Gerais: Tabuleiro ad. fl. S. Francisco, prope Salgado, s. d. (fl.), C. F. P. von Martius 1675 (Lectotype: M, first step designated by
Shrubs or scandent shrubs, (0.8–)1–3 m tall; branchlets sparsely hirsute to hirsute, lenticels abundant, inconspicuous. Leaves 9–13(–15)-foliolate, congested or loosely disposed; petiole 0.8–1.8 cm long, sparsely hirsute, with glandular trichomes; rachis 4–6 cm long, sparsely hirsute, with glandular trichomes; leaflets opposite to subopposite, subsessile; blade of the basal pair of leaflets 0.9–1.8 × 0.6–1.2 cm, orbicular, ovate or narrowly elliptic, others 1.2–3(–4) × 0.7–1.6 cm, oblong, narrowly elliptic or narrowly obovate, chartaceous, slightly discolorous, abaxially hirsute or villous, brownish or greenish, adaxially subglabrous, sparsely hirsute or sparsely villous, dull, base slightly asymmetric or symmetric, cordate, subcordate or rounded, apex rounded, rarely obtuse, margin flat, ciliate; midvein abaxially prominent, adaxially flat, secondary veins ca. 6 pairs, abaxially slightly prominent, adaxially flat, tertiary veins slightly prominent on both surfaces. Inflorescences in axillary or pseudoterminal cymes; bracts ca. 3 mm long; peduncle 0.9–3.8 cm long, hirsute, with glandular trichomes; rachis 0.5–2.2 cm long, hirsute, with glandular trichomes. Flowers congested apically; buds 4 × 2.5–3 mm, elliptic or orbicular; pedicel ca. 2 mm long, with glandular trichomes, 2 bracteoles located up to the lower half, persistent; sepals 5 × 2–2.5 mm, chartaceous, ovate, outer surface hirsute, with glandular trichomes, inner surface glabrous or subglabrous, sparsely sericeous at the apex, margin ciliate, more densely at the apex; petals ca. 7 × 2.5 mm, narrowly obovate, glabrous on both surfaces; stamens connate at base by ca. 1 mm, shorter series ca. 5 mm long, longer series ca. 7 mm long, glabrous; ovary ca. 1 mm long, hirsute, style ca. 2 mm long, hirsute, glabrous only at the apex, stigma peltate, bilobate. Fruits 1–1.2 × 0.4–0.5 cm, orangish or reddish, outer surface subglabrous or sparsely villous, more densely at the apex, inner surface glabrous or subglabrous, apex obtuse, style partially persistent, calyx covering one third of the fruit; seeds ca. 0.8–0.9 × 0.4–0.5 cm, arillode yellowish.
This species occurs in central and northeast Minas Gerais and southwest Bahia (Fig.
Brazil. Bahia: Caetité, 5–8 km S, 21 Oct 1995 (fl.), G. Hatschbach & J. T. Motta 63237 (RB); Riacho de Santana, Estrada para Igaporã, km 89, 13.7487S, 42.7673W, 12 Oct 2007 (fr.), J. Paula-Souza et al. 9376 (CTES, SI, SPF). Minas Gerais: Grão Mogol, Assentamento Americana. 19 Nov 2014 (fr.), A. B. Giroldo & J. B. Pereira 330 (CEN); Divisópolis, próximo da cidade, s. d. (fl.), G. M. Magalhães 15790 (BHCB); Januária, Vale do Peruaçu, Carascal, 26 Oct 1997 (fr.), A. Salino & L. C. N. Neto 3706 (BHCB, MBM, SPF); Comunidade Boa Vista, 02 Nov 2006 (fr.), A. C. Sevilha 4597 (CEN); Juramento, Plantar MG 15, Fazenda Tamanduá, 10 Apr 2005 (fl.). E. Temeirão Neto 4225 (BHCB); E. Temeirão Neto 4273 (BHCB).
Rourea martiana is recognised by possessing glandular trichomes, a relatively long-peduncle (0.9–3.8 cm) and a short pedicel (ca 2 mm long).
After fixing the application of R. martiana to Martius 1675, however, both
The position taken by
The type collection from M is composed of two herbarium sheets mounted separately, but one of them (barcode M-0243940) has an original blue label of Martius, whereas the other (barcode M-0243941) has a different label. According to the Code (
Brazil. Minas Gerais: Rio Pardo de Minas, Vereda Funda, parcela 4, 15°57'20"S, 42°27'23"W, 981 m alt., 11 Dec 2008 (fr.), A. C. Sevilha et al. 5011 (Holotype: CEN barcode CEN 00097193!; isotype: ESA!).
Subshrubs prostrate; branchlets tomentose, lenticels sparse, inconspicuous. Leaves 13–17(–21)-foliolate, loosely disposed; petiole 0.2–1 cm long, villous, with glandular trichomes; rachis 3–5.5 cm long, villous, with glandular trichomes; leaflets subopposite, subsessile; blade of the basal pair of leaflets 0.5–1 × 0.3–0.7 cm, orbicular, others 0.9–1.7 × 0.5–1 cm, oblong, rarely elliptic or narrowly obovate, chartaceous, discolorous, abaxially villous, greenish, adaxially sparsely villous, dull, base slightly asymmetric, rounded or subcordate, apex rounded, margin flat, ciliate; midvein abaxially prominent, adaxially flat, secondary veins 5–6 pairs, abaxially slightly prominent, adaxially flat or slightly prominent, tertiary veins flat on both surfaces. Inflorescences in axillary cymes; bracts ca. 2 mm long; peduncle 0.7–1.8 cm long, hirsute, with glandular trichomes; rachis 1.3–2.2 cm long, hirsute, with glandular trichomes. Flowers unknown, loosely disposed; pedicel 3–8 mm long, with glandular trichomes, 1–2 bracteoles located up the lower half; sepals (persistent on fruits) with outer surface sparsely hirsute, with glandular trichomes, inner surface subglabrous, margin ciliate; petals (persistent on fruits) glabrous; stamens (persistent on fruits) with sparse glandular trichomes; ovary (persistent on fruits) densely hirsute, style subglabrous, stigma not seen. Fruits 0.8–1×0.3–0.4 cm, colour not seen, outer surface sparsely hirsute, more densely at the apex, inner surface glabrous, apex acuminate, style partially persistent, calyx covering one third of the fruit; seeds 0.7–0.8×0.4 cm, arillode colour not seen.
Rourea prostrata in only known from the type location (15°57'20"S, 42°27'23"W), which is near the municipality of Rio Pardo de Minas, MG (Fig.
Rourea prostrata is morphologically similar to R. bahiensis due to the number and size of leaflets. However, R. prostrata is a prostrate subshrub with glandular trichomes, while R. bahiensis is a liana or scandent shrub eglandular. Rourea prostrata can also be mistaken for R. chrysomalla, although it mainly differs by its prostrate habit, chartaceous leaflets and sparsely hirsute fruits measuring 0.8–1 × 0.3–0.4 cm vs. erect habit, coriaceous leaflets and completely velutinous fruits measuring 1–1.4 × 0.4–0.6 cm.
Rourea carvalhoi Forero, Carbonó & L. A. Vidal, Revista Brasil. Bot. 7(1): 72. 1984. Type. Brazil. Bahia: Km. 6 da rod. Teixeira de Freitas a Alcobaça, 9 Oct 1971 (fr.), T. S. Santos 2094 (Holotype: CEPEC 7633!; isotypes: COL!, NY!).
Brazil. Vittoria, s. d. (fr.), F. Sellow s. n. (Holotype: B†). Brazil. S. d. (fl.), J. Pohl s. n. (Neotype: BR barcode BR 000000697468!, selected by
Lianas or scandent shrubs, (0.5–)1–3 m tall; branchlets sparsely hirsute to glabrescent, lenticels absent or sparse, inconspicuous. Leaves 5–7-foliolate, loosely disposed or congested; petiole 2.7–7 cm long, sparsely hirsute, with glandular trichomes; rachis 2.6–6.5 cm long, sparsely hirsute, with glandular trichomes; leaflets opposite to subopposite, pulvinulus 1–2 mm long; blade of the basal pair of leaflets 2.3–5.7(–7.7) × 1.4–2.5(–4) cm, elliptic or ovate, others 3.5–8.4(–13) × 2.1–3(–6.7) cm, elliptic or ovate, rarely oblong, chartaceous, slightly discolorous, abaxially sparsely hirsute, more densely on the veins, brownish or greenish, adaxially sparsely hirsute on the veins, dull, base slightly asymmetric, symmetric in the apical leaflet, rounded, obtuse or subcordate, occasionally acute in the apical leaflet, apex obtuse or narrowly rounded, occasionally short-acuminate, margin flat to revolute, ciliate; midvein abaxially prominent, adaxially flat or slightly impressed, secondary veins 5–7 pairs, abaxially slightly prominent, adaxially flat, tertiary veins flat on both surfaces. Inflorescences in axillary or pseudoterminal determinate thyrses, rarely panicles; bracts ca. 2 mm long; peduncle 1.9–6.4 cm long, hirsute, with glandular trichomes; rachis (0.7–)2–5.8(–7.7) cm long, hirsute, with glandular trichomes; lateral branches 0.5–3 cm long, hirsute, with glandular trichomes. Flowers loosely disposed or congested apically; buds 2.5–4 × 1.5–2 mm, orbicular or elliptic; pedicel 5–10 mm long, with glandular trichomes, 2 bracteoles located up the lower third, persistent or deciduous; sepals 4–5 × 1–2 mm, chartaceous, ovate, outer surface sparsely hirsute, with glandular trichomes, inner surface glabrous, margin ciliate, more densely at the apex; petals 5–7 × 1.5–2 mm, oblong or narrowly oblong, glabrous or subglabrous on both surfaces; stamens connate at base by ca. 0.8 mm, shorter series 3–3.5 mm long, longer series ca. 5 mm long, glabrous; ovary ca. 1 mm long, densely hirsute, style ca. 1.5 mm long, sparsely villous, subglabrous at the apex, stigma peltate, trilobate to pentalobate. Fruits 1.3–1.5 × 0.6–0.8 cm, reddish or orangish, outer surface sparsely hirsute, more densely at the apex, inner surface glabrous, apex acuminate, style partially persistent, calyx covering one third of the fruit; seeds 1.2–1.3 × 0.5–0.7 cm, arillode colour not seen.
Rourea tenuis occurs in Bahia and Espírito Santo, with limits ranging from the municipalities of Itanhém (North) to Linhares (South) (Fig.
Brazil. Bahia: Porto Seguro, Parque Nacional de Monte Pascoal, área limite entre o PARNA e a Reserva Indígena Barra Velha, da tribo Pataxó, 13 Apr 1998 (fl.), A. M. Amorim et al. 2530 (CEPEC, NY); Itamarajú, Estrada a Piraji, km 4, 17°15'S, 39°20'W, 1 Jun 1983 (fl.), R. Callejas et al. 1612 (NY); Itamarajú, 2 km de estrada a Piraji, km 4, 5 Apr 1971 (fl.), T. S. dos Santos 1558 (NY!); Itanhém, Fazenda Pedra Grande, 16.2 km west of Itanhém on road to Batinga, then 0.6 km north to Fazenda (owner Otevaldo Resende da Silva), 17°07'57.8"S, 40°25'17.8"W, 18 Mar 2001 (fr.), W. W. Thomas et al. 12351 (CEPEC, NY, RB, SPF). Espírito Santo: Reserva Natural Vale, estrada Fruta de arara, 1 Jun 2001 (fl.), D. A. Folli 3940 (CVRD, ESA); Reserva Natural Vale, estrada Braúna Preta, 12 Apr 2002 (fr.), D. A. Folli 4352 (CVRD, ESA); Linhares. 5 km S, 5 Aug 1983 (fr.), G. Hatschbach 46735 (CEPEC, MBM); Floresta Atlântica de Tabuleiro, área com corte seletivo, em regeneração, 19.4000S, 39.9722W, 3 Oct 2000 (fr.), O. J. Pereira et al. 6541 (VIES).
Rourea tenuis is recognised by leaves 5–7-foliolate, leaflets usually elliptic or ovate, abaxially hirsute and inflorescences in thyrses or panicles with glandular trichomes.
Rourea subgen. R. sect. Multifoliolatae is a small group of this pantropical genus, with species restricted to south-eastern Brazil and southern Bahia. Most of the species in this section are presumably rare and present restricted distributions, such as R. blanchetiana, R. chrysomalla and R. diamantina and some are only known by the type collection (e.g. R. barbata and R. prostrata). An exception is R. glazioui, which is more widely distributed, very common from north ES to central RJ and well represented in herbarium collections.
Although Rourea species have been grouped within different taxonomic ranks (subgenera and sections) over time, none has been tested using molecular data. By comparing the species of R. subgen. R. sect. Multifoliolatae with some Rourea from south-eastern Asia, such as R. fulgens and R. mimosoides, it has been noted that there is a strong morphological resemblance, both in overall similarity of the referred taxa and when particular species are compared (e.g. R. glazioui vs. R. fulgens). This suggests uncertainty regarding currently-accepted infrageneric classifications. Molecular-based phylogenies are, therefore, essential to achieve a better understanding on the classification, evolution and distribution of the genus.
Similarly, such molecular approaches could also be used to re-evaluate the morphological circumscription traditionally applied to R. subgen. R. sect. Multifoliolatae.
The authors thank FAPESP for supporting a large-scale project on Connaraceae (process number 2019/03173-0), CAPES for providing a scholarship to CAPT (process number 88882.329252/2018-01) and IAPT for the 2019 grant research conceded to the same author. This work was successfully developed thanks to the curators of BHCB, CEN, CVRD, SPF and UB herbaria who sent specimens for consultation. A special acknowledgement to Jefferson Prado and Gustavo Shimizu who helped with nomenclatural issues and Hans-Joachim Esser who kindly shared images of type specimens from M herbarium. The authors finally thank Maíra Mezzacappa for the illustrations and Jair Faria and Thiago Flores for sharing photographs.