Research Article |
Corresponding author: Alejandra Flores-Argüelles ( afa2502@gmail.com ) Academic editor: Leonardo Versieux
© 2022 Alejandra Flores-Argüelles, Ana Rosa López-Ferrari, Edith González-Rocha, Adolfo Espejo-Serna.
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:
Flores-Argüelles A, López-Ferrari AR, González-Rocha E, Espejo-Serna A (2022) Pitcairnia abscondita (Pitcairnioideae, Bromeliaceae), a hidden novelty from north-western Jalisco, Mexico. PhytoKeys 189: 129-139. https://doi.org/10.3897/phytokeys.189.76464
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Pitcairnia abscondita sp. nov., known until now only from the Municipalities of Cabo Corrientes, Mascota, Puerto Vallarta, San Sebastián del Oeste and Talpa de Allende in the State of Jalisco, Mexico, is here described and illustrated. The new taxon was confused with P. imbricata for long time, but differs from this species by its green floral bracts with the apex divergent to spreading (vs. red and appressed) and by the appendiculate at the base chartreuse-green petals (vs. not appendiculate yellow petals). Images and a distribution map of the taxa are presented.
Se describe e ilustra Pitcairnia abscondita sp. nov., conocida hasta ahora únicamente de los municipios de Cabo Corrientes, Mascota, Puerto Vallarta, San Sebastián del Oeste y Talpa de Allende, en el estado de Jalisco, México. El nuevo taxon fue por largo tiempo confundido con P. imbricata, pero difiere de la misma por sus brácteas florales verdes con el ápice divergente a extendido (vs. brácteas rojas y adpresas) y por sus pétalos verdes chartreuse con apéndices en la base (vs. pétalos amarillos sin apéndices en la base). Se incluyen imágenes y un mapa de distribución de las especies.
Jalisco north coast, Pitcairnia subgenus Pitcairnia
Costa norte de Jalisco, Pitcairnia subgénero Pitcairnia
Pitcairnia L’Hér. (L’Héritier 1789–1790 [1788]) with ca. 409 spp. (
During the fieldwork for the fulfilment of the Master’s Thesis of the first author (
Plants were collected in the years 2019 and 2020 in the Municipality of Cabo Corrientes, Jalisco, Mexico. The gathering of the specimens was carried out in accordance with
Mexico. Jalisco: municipio Cabo Corrientes, ejido Las Juntas y Los Veranos, santuario las Guacamayas, 20°25.802'N, 105°18.978'W, 600 m a.s.l., bosque de galería, 25 Jan 2020, flowered in cultivation, 12 Jul 2021, A. Flores-Argüelles, G. Contreras-Félix & J. Novoa 1189 (holotype:
Similar to Pitcairnia imbricata, but differs by the presence of green, widely oblong to widely ovate floral bracts with the apex divergent to spreading (vs. red elliptic with the apex appressed to the rachis), arcuate corollas (vs. erect), appendiculate, chartreuse-green, 9.4–9.8 cm long, petals (vs. yellow, not appendiculate 6.5–6.6 cm long).
Plant terrestrial or rupicolous, growing frequently along streams, aerial portion of the stem inconspicuous, with underground erect rhizomes ca. 5 cm in diam., flowering 100–110 cm tall. Roots fibrous, thin. Rosettes 40–50 cm high, 90–110 cm diam. Leaves 10 to 50, rosulate, monomorphic, pseudopetiolate; sheaths brown to light brown, with a transverse white band at the base, triangular, 5–6 cm long, 5–6 cm wide at the base, strongly nerved, densely white-tomentose abaxially, entire; pseudopetiole 20–40 cm long, ca. 10 mm wide, involute, margins minutely spinose-serrate, densely white-tomentose abaxially at the base; blades green, linear, attenuate towards the apical portion, 90–170 cm long, 2.5–5.5 cm wide at its widest part, with a central longitudinal channel, entire, very sparsely lepidote adaxially, glabrous abaxially. Inflorescence terminal, simple, erect to arched; peduncle green, cylindrical, 70–77 cm long, 0.7–1.4 cm in diam. at the base; peduncle bracts green, foliaceous, erect, the sheaths appressed, the blades becoming progressively reduced distally, narrowly triangular, 4–35 cm long, ca. 3 cm wide at the base, entire, attenuate to long-attenuate, glabrescent to glabrous on both surfaces; spike terete, 10–50 cm long, 3.5–4 cm in diam., rachis wholly covered by the floral bracts; floral bracts foliaceous, appressed and imbricate, green, widely oblong to widely ovate, 49–52 mm long, 30–32 mm wide, the apex acuminate, divergent to spreading in living plants, the margin hyaline, glabrous on both surfaces, much longer than the sepals. Flowers 25–80 per inflorescence, polystichous, zygomorphic, slightly, but conspicuously arcuate-recurved, sessile, acropetalous; sepals free, green, oblong, 28–30 mm long, 9–11 mm wide, ecarinate, nerved, acute and shortly apiculate, glabrous; petals free, chartreuse green, narrowly oblanceolate, 94–98 mm long, 14–19 mm wide, rounded and very shortly apiculate, with an adaxially basal, oblong, ca. 13 mm long × ca. 6 mm wide, erose appendage, almost completely adnate to the petal; stamens all equal in length, shorter than the petals, filaments whitish, filiform, 71–72 mm long; anthers yellow, linear, 16–17 mm long, basifixed; ovary half superior, greenish-white, ovoid, ca. 15 mm long, ca. 6 mm in diam., glabrous; style linear, arcuate-recurved, ca. 78 mm long; stigma white, conduplicate-spiral (type II sensu
The specific epithet refers to the fact that, for a long time, the specimens of this species was “hidden” behind the name Pitcairnia imbricata (see
Pitcairnia abscondita is known until now only from the State of Jalisco, in the Municipalities of Cabo Corrientes, Mascota, Puerto Vallarta, San Sebastián del Oeste and Talpa de Allende (Fig.
Mexico. Jalisco: Municipio Cabo Corrientes: 3–10 km generally east on the road to Mina del Cuale, from the junction 5 km northwest of El Tuito, 850–1,150 m elev., steep mountainsides pine-oak forest on decomposed granitic soils, with Podocarpus, oaks and other deciduous trees in rocky stream valleys, 16–19 Feb 1975, R. McVaugh 26385 (MEXU (two sheets)); MICH (two sheets)); entre El Tuito y Puerto Vallarta, a 20 km de Puerto Vallarta y a 20 km de El Tuito, ca. 450 m elev., bosque de pino-encino, 19 Jul 1976, A. Delgado S. & R. Hernández M. 2617 (MEXU); km 18 camino El Tuito hacia la mina de Zimapán, 960 m elev., bosque mesófilo de montaña, 1 Jun 1985, J.A. Pérez de la Rosa 974 (IBUG); ca. 0.5 km después de Pedro Moreno, rumbo a El Tuito, 637 m elev., 20°24.3833'N, 105°18.2'W, 30 Jul 2003, J. Ceja, A. Espejo, A.R. López-Ferrari, A. Mendoza R. & I. Ramírez M. 1476 (
In herbarium specimens, Pitcairnia abscondita superficially resembles P. imbricata and/or P. wendlandii. However, the new taxon differs from these two species by the characters shown in Table
Comparative features of Pitcairnia abscondita with P. imbricata and P. wendlandii (see also Figs
P. abscondita | P. imbricata | P. wendlandii | |
Leaf blades (cm) | 90–170 × 4.5–5.5 | 70–120 × 5.5–6 | 50–110 × 4–4.5 |
Floral Bracts (mm) | widely oblong to widely ovate, green, divergent to spreading at the apex; 49–52 × 30–32 | elliptic, red, appressed at the apex; 35–57 × 13–24 | elliptic, red to greenish-red, divergent to spreading at the apex; 65–66 × 22–25 |
Flowers | arcuate-recurved | straight | straight |
Sepals (mm) | oblong, acute apiculate; 28–30 × 9–11 | oblong apiculate; 21–22 × ca. 8 | narrowly triangular, acute; 20–21 × ca. 3 |
Petals (mm) | narrowly oblanceolate, chartreuse green; 94–98 × 14–19 | narrowly oblong, yellow; 65–66 × 12–13 | narrowly oblong, to linear, yellow-greenish; 69–70 × 9–10 |
Anthers (mm) | 16–17 | ca. 11 | 13–14 |
Distribution (Mexico) | Jalisco | Chiapas, Guerrero, Jalisco, Oaxaca, Puebla, Veracruz | Chiapas, Guerrero, Oaxaca |
The flowers of Pitcairnia abscondita last only one night, opening between 7.30 and 9.30 pm and remain that way during the night, starting to close at 7.30 in the morning, being completely closed at 9.00 am, so they are likely associated with a pollination syndrome by moths or bats, different from P. imbricata which, due to its red floral bracts and yellow flowers of diurnal anthesis, is associated with an ornithophilic pollination syndrome (
As far as we know, the plants of P. abscondita are not used by the inhabitants of the region, so we think that the species has no immediate human pressure; however and due to the lack of detailed information about the precise distribution of the species, we suggest the inclusion of the new taxon in the Not Evaluated (NE) category of the
We thank Walter Till, Eric Gouda and two anonymous reviewers for their critical review and improvement of the manuscript. Rodrigo Hernández-Cárdenas, Lizetth Jimena Hernández-Barón, Gerardo Contreras-Félix and Jorge Novoa-Ramos helped us in the fieldwork. The curators of the following Herbaria gave us all the facilities to consult their collections: A, C, CHAP, CICY, ENCB, FCME, GH, HEM, IBUG, IEB, MEXU, MICH, MO, P, SERO,
Specimens examined.
1. Pitcairnia imbricata (Brongn.) Regel
Mexico. Chiapas: Municipio Berriozábal, C.R. Beutelspacher 29652 (HEM), D.E. Breedlove & R.F. Thorne 30896 (MEXU); municipio de Chilón, D.E. Breedlove 34566 (ENCB; municipio El Bosque, D.E. Breedlove & R.L. Dressler 29831 (MEXU, MO); municipio La Trinitaria, D.E. Breedlove 56560 (ENCB); municipio Ocosingo, E. Martínez S. 17047 (CICY, MEXU), E. Martínez S. 17610 (MEXU, MO), E. Martínez S. et al. M-21912 (MEXU), G. Aguilar M. et al. 6924 (
2. Pitcairnia wendlandii Baker
Mexico. Chiapas: Municipio Acacoyagua, E. Matuda 17729 (MEXU, MO), N. Martínez-Meléndez 916 (HEM); municipio Ángel Albino Corzo, M.A. Pérez Farrera 1166 (HEM); municipio Jiquipilas, D.E. Breedlove 23970 (ENCB), M.A. Pérez Farrera 463 (HEM); municipio La Concordia, D.E. Breedlove 40123 (MEXU), G. del C. López H.159 (HEM), J. Martínez-Meléndez 641 (