Research Article |
Corresponding author: Ming Tang ( tangming@jxau.edu.cn ) Academic editor: Peter de Lange
© 2023 Liao-Chen Zhao, Ren Chen, Zhi-Yong Yu, Ming Tang, Qin-Er Yang.
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:
Zhao L-C, Chen R, Yu Z-Y, Tang M, Yang Q-E (2023) Synotis jinpingensis (Asteraceae, Senecioneae), a new species with white ray florets from southeastern Yunnan, China. PhytoKeys 235: 199-210. https://doi.org/10.3897/phytokeys.235.112230
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Synotis jinpingensis (Asteraceae, Senecioneae), a new species from Jinping county in southeastern Yunnan province, China, is described and illustrated. This species is distinguished by having white ray florets in the genus Synotis, in which only species with yellow ray florets have been hitherto known. In habit and leaf shape S. jinpingensis is most closely similar to S. duclouxii, a species occurring in southwestern Guizhou, southern Sichuan and northeastern Yunnan, China, but differs, in addition to the color of ray florets, by having fewer lateral veins of leaves, obviously longer bracts of calyculus, and larger phyllaries. The membership of the new species within Synotis is strongly corroborated by evidence from floral micromorphology and phylogenetic analyses based on ITS sequence data. Color photographs of living plants, a distribution map, and provisional IUCN status of S. jinpingensis are provided.
Compositae, floral micromorphology, ITS sequence data, taxonomy
Synotis (Clarke) C. Jeffrey & Y.L. Chen (Asteraceae, Senecioneae), was segregated from Senecio L. based on its sub-shrubby habit and anther bases with sterile tailed auricles. Synotis is endemic to the Sino-Himalayan region, except for two species occurring in northwestern China and Kyrgyzstan (
During a botanical trip in March 2022 to southeastern Yunnan, China, we discovered an unusual population of Synotis with white ray florets (Fig.
Synotis jinpingensis in the wild (Jinping, Yunnan, China) A habitat B habit C portion of stem D leaves (left three: adaxial side; right three: abaxial side) E synflorescence F capitulum (side view) G capitulum (top view) H florets (left: ray floret; right: disk floret) I phyllaries (left: adaxial side; right: abaxial side) J bracts of calyculus.
We conducted careful observations of living plants in a population of the new species in Jinping county in southeastern Yunnan, China. All the major morphological characters, including the habit, the shape and size of leaves, involucres, ray and disk florets, and the type of synflorescence, which were observed and photographed On living plants by digital camera (OLYMPUS TG-6, Tokyo).
For the study of three floral micromorphological characters of the new species (voucher: Z. Y. Yu et al. JXAU 01, JXAU), including papillae on style arms, filament collar, and anther endothecial cell thickenings in stamens [(for all these three micromorphological characters were considered taxonomic significance in the Synotis reported by
Based on the results of previous phylogenetic analyses of the tribe Senecioneae (
Total genomic DNA of Synotis cavaleriei, S. duclouxii and our new species were extracted from silica gel-dried leaves using the modified CTAB method of
All sequences were aligned with MAFFT 7.450 (
As shown in Figs
The central tuft of papillae on the style arms of our new species is prominent, much longer than laterals (Fig.
Our ML and BI analyses produce almost identical topologies, and they are also consistent with the results of previous studies (
China. Yunnan province: Jinping county, Fenshuiling National Nature Reserve, Guaitang village, in mixed forests, alt. ca. 2400 m, 22°45′36.87″N, 103°28′4.65″E, 30 March 2022, Z.Y. Yu et al. JXAU 01 (holotype: JXAU; isotypes: IBSC, JXAU). Fig.
Synotis jinpingensis is most closely similar to S. duclouxii in habit and leaf shape, but differs by having white (vs. yellow) ray florets, fewer nerves on the leaves (10–14 vs. 18–20), longer bracts of calyculus (6–8 mm vs. 1–3 mm), and larger phyllaries (8–10 mm long, 2–3 mm broad vs. 5–7 mm long, 1– 2 mm broad).
Perennial herbs, erect, rhizomatous. Rhizome thick, horizontal. Vegetative stems solitary, simple, rarely branched, erect, 50–100 cm tall, median and lower parts subglabrous, upper part often densely yellowish setulose. Flowering stems solitary, erect, scapiform, 15–30 cm tall, few-branched, fulvous tomentose. Leaves always aggregate at base of fertile shoot; petioles 1–1.5 cm long; blades obovate-lanceolate or elliptic, 12–18 cm long, 2.5–4 cm broad, papyraceous, abaxially glabrous or subglabrous, adaxially sparsely pubescent, pinnately veined, lateral veins 10–14, arcuate-ascending, base cuneate, margin shallowly sinuate-apiculate, apex acute-acuminate. Stem leaves on reproductive shoots few, narrowly lanceolate, remote, much smaller. Capitula radiate, numerous, arranged in an attenuate broadly paniculoid corymb; peduncles 3–5 mm long, fulvous tomentose, 1- or 2-bracteate; bracts below capitula linear, 5–20 mm long. Involucres cylindric-campanulate, 8–10 mm long, 2–3 mm broad, with 7–10 subulate bracteoles at base, bracts of calyculus linear, 6–8 mm long, green, apically purple; phyllaries usually 7 or 8, occasionally 5 or 6, oblong, 2–3 mm broad, green, herbaceous, glabrous, apically acute, purple. Ray florets 7 or 8; corolla tube 3.5–4.5 mm long, glabrous; lamina white, oblong-lanceolate, 6–9 mm long, 1.5–2.5 mm broad, 3–4-veined, apically obtuse, 3-denticulate. Disk florets 8–12, white; corolla 4–5 mm long, with ca. 4.5 mm long tube and funnelform limb; lobes ovate-oblong, 3–3.5 mm long, apically acute. Anthers ca. 3 mm, anther tails ca. 1.5 times as long as antheropodia; appendages ovate-oblong; antheropodia slightly dilated at base. Style branches ca. 2 mm long, fringed with long fine papillae, the central tuft prominent, much longer than laterals. Achenes 1.8–2 mm, glabrous. Pappus white, 6–7.5 mm long.
Flowering from March to April; fruiting from April to July.
The species is named after its type locality, i.e., Jinping county in southeastern Yunnan province, China.
Synotis jinpingensis is currently known from its type locality, i.e., Jinping county in southeastern Yunnan province, China (Fig.
Synotis jinpingensis seems currently known only from its type locality. Four small populations of this species, each with ca. 100 individuals, have been discovered there. The habitat of S. jinpingensis is now well preserved. The discovery of further populations of this species is to be expected as botanical exploration of southeastern Yunnan proceeds. According to the IUCN Red List Categories and Criteria (
We thank Dr. Patricio Saldivia Pérez and Dr. Rob Smissen for their helpful comments which helped to improve our manuscript. We also thank Mr. Zongli Liang, Mr. Jianhong Li and Mr. Hailong He with the Fenshuiling National Nature Reserve in Jinping county, Yunnan, China, for their help with the field work.
The authors have declared that no competing interests exist.
No ethical statement was reported.
This work was supported by the National Natural Science Foundation of China (grant no. 31960043).
Data curation: ZYY. Formal analysis: RC, LCZ. Writing – original draft: MT. Writing – review and editing: QEY.
Liao-Chen Zhao https://orcid.org/0000-0002-6300-7301
Ren Chen https://orcid.org/0000-0002-0910-9737
Zhi-Yong Yu https://orcid.org/0000-0001-8276-5901
Ming Tang https://orcid.org/0000-0001-8419-0996
Qin-Er Yang https://orcid.org/0000-0002-6261-0731
All of the data that support the findings of this study are available in the main text.
Voucher information and GenBank accession of species used in our study.
GenBank | Species | Voucher information | Herbarium |
---|---|---|---|
MH371137 | Synotis atractylidifolia (Y. Ling) C. Jeffrey & Y. L. Chen | M. Tang & L. Wang 361 | IBSC |
EF538402 | Synotis cappa (Buch.-Ham. ex D. Don) C. Jeffrey & Y. L. Chen | Tessier-Yandell 86 | IBSC |
KJ851593 | Synotis chenopodiifolia (DC.) M. Tang et al. | M. Tang & C. Ren 532 | IBSC |
KU696133 | Synotis erythropappa (Bureau & Franch.) C. Jeffrey & Y. L. Chen A | C. Ren 150 | IBSC |
MH117782 | Synotis erythropappa (Bureau & Franch.) C. Jeffrey & Y. L. Chen B | YLDP026D | IBSC |
MH371138 | Synotis karelinioides (C. Winkl.) C. Ren et al. | H.M. Li & Q.G. Mao 325 | IBSC |
AY723255 | Synotis lucorum (Franch.) C. Jeffrey & Y. L. Chen A | J.Q. Liu 2177 | IBSC |
KU696134 | Synotis lucorum (Franch.) C. Jeffrey & Y. L. Chen B | Q.E. Yang et al. 3128 | IBSC |
KU696135 | Synotis muliensis Y. L. Chen | C. Ren 148 | IBSC |
AF459922 | Synotis nagensium (C. B. Clarke) C. Jeffrey & Y. L. Chen | B. Bartholomew et al. 1991 | IBSC |
KY347902 | Synotis penninervis (H. Koyama) T.J. Tong et al. | M. Tang & C. Ren 626 | IBSC |
KX549951 | Synotis solidaginea (Hand.-Mazz.) C. Jeffrey & Y. L. Chen | 2015XZ001-B | IBSC |
– | Synotis duclouxii (Dunn) C. Jeffrey & Y. L. Chen | C. Ren & L.Y. Wang 485 | IBSC |
– | Synotis cavaleriei (H. Lév.) C. Jeffrey & Y. L. Chen | L.Y. Wang 72 | IBSC |
– | Synotis jinpingensis M. Tang et al. | Y. Yu et al. JXAU01 | JXAU |
EF538296 | Senecio algens Wedd. | S.G. Beck 2879 | S |
EF538298 | Senecio arnicoides Hook. & Arn. | O. Zoellner 3474 | L |
GU818506 | Senecio cadiscus B. Nord. & Pelser | Rourke 1118 | S |
KU499905 | Senecio changii C. Ren & Q. E. Yang | C. Ren et al. WL146 | IBSC |
EF538313 | Senecio chilensis Less. | O. Zollner 2958 | S |
EF538290 | Senecio crusoei Pelser | T. Stussey 6560 | H |
EF538322 | Senecio ctenophyllus Phil. | O. Zoellner 3959 | U |
EF538312 | Senecio culcitioides Wedd. | B. Ollgaard & H. Balslev 8822 | CHR |
AF459946 | Senecio doria L. | P.B. Pelser cult. 129 | WIS |
JX895355 | Senecio doronicum (L.) L. | J. Calvo 4000 | WIS |
GU818642 | Senecio elegans L. | Cron & Goodman 687 | – |
EF538335 | Senecio fistulosus Poepp. ex Less. | S.G. Beck & M. Liberman 9672 | MJG |
EF538336 | Senecio flaccidus Less. | J. Thuret s.n. | MJG |
GU818649 | Senecio gayanus DC. | M. Rosas 2157 | – |
GU818650 | Senecio gramineus Harv. | F.K. Hoener 2104 | – |
GU818651 | Senecio gregorii F. Muell. | D.E. Albrecht 7091 | – |
GU818652 | Senecio hieracium J. Rémy | M. Baeza & L. Finot 3695 | – |
EF538348 | Senecio hypsobates Wedd | B. Ollgaard & H. Balslev 9863 | U |
GU818662 | Senecio ilicifolius L. | Cron & Goodman 686 | |
EF538150 | Senecio involucratus (Kunth) DC. | B. Nordenstam 9438 | L |
AF459937 | Senecio nemorensis L. | P.B. Pelser cult.102 | L |
EF538362 | Senecio oerstedianus Benth. | B. Nordenstam 9160 | S |
EF538373 | Senecio roseus Sch. Bip. | J. Garcia P. 250 | U |
JX895384 | Senecio scopolii Hoppe & Hornsch. ex Bluff & Fingerh. | J. Calvo 4715 | – |
EF538222 | Senecio suaveolens (L.) Elliott | D.C. Dister s.n. | MJG |
GU817570 | Senecio tauricolus V. A. Matthews | Budak et al. 1735 | – |
GU818707 | Senecio triodon Phil. | F. Luebert & S. Teillier 2266 | – |
GU818708 | Senecio vestitus P. J. Bergius | W. Greuter 21766 | – |
AF459925 | Senecio viscosus L. | P.B. Pelser 300 | TEX |
AF459924 | Senecio vulgaris L. | P.B. Pelser cult. 188 | CHR |
GU818721 | Stilpnogyne bellidioides DC. | P. Goldblatt & L. Porter 11729 | – |
EF538416 | Zemisia discolor (Sw.) B. Nord. | G.L. Webster et al. 8420 | S |
EF538143 | Abrotanella emarginata (Gaudich.) Cass. | R.N.P. Goodall & J. Wood 3352 | MU |
EF538146 | Adenostyles alpina Bluff & Fingerh. | C.H. Uhink 98-189a | MJG |
EF538156 | Arrhenechthites mixta (A. Rich.) Belcher | M.E. Lawrence 1308 | S |
GU818508 | Capelio caledonica B. Nord. | B. Nordenstam 9644 | – |
EF538167 | Chersodoma jodopappa (Sch. Bip.) Cabrera | I. Hensen 2617 | S |
GU818512 | Cineraria abyssinica Sch. Bip. ex A. Rich. | P.B. Pelser cult. 208 | L |
EF538172 | Cissampelopsis volubilis (Blume) Miq. | Carvalho 3175 | US |
AF459968 | Crassocephalum crepidioides (Benth.) S. Moore | P.B. Pelser cult. 354 | S |
GU818541 | Crocidium multicaule Hook. | B. Bartholomew 5749 | – |
AF457413 | Dauresia alliariifolia (O. Hoffm.) B. Nord. & Pelser | Mueller & Tilson 907 | – |
EF538181 | Dendrophorbium bomanii (R. E. Fr.) C. Jeffrey | M. Dematteis & G. Seijo 722 | MU |
GU818546 | Dolichoglottis lyallii (Hook. f.) B. Nord. | A. Strid 22172 | – |
AF459966 | Emilia coccinea (Sims) G. Don | P.B. Pelser cult. 126 | MJG |
EF538211 | Garcibarrigoa telembina (Cuatrec.) Cuatrec. | L. Holm-Nielsen et al. 6211 | S |
KU570815 | Homogyne alpina Cass. | Comes 11 | MJG |
GU818559 | Io ambondrombeensis (Humbert) B. Nord. | S.T. Malcomber et al. 1380 | – |
AF459941 | Jacobaea vulgaris Gaertn. | P.B. Pelser cult. 6 | S |
EF538246 | Jessea multivenia (Benth.) H. Rob. & Cuatrec. | B. Nordenstam 9161 | K |
GU818568 | Kleinia neriifolia Haw. | P.B. Pelser cult. 216 | – |
GU818574 | Lachanodes arborea (Roxb.) B. Nord. | R. Cairns-Wicks s.n. | – |
EF538249 | Leonis trineura (Griseb.) B. Nord. | Smith et al. 3238 | L |
EF538250 | Lepidospartum burgessii B.L. Turner | R.D. Worthington 12382 | L |
AF459961 | Ligularia stenocephala (Maxim.) Matsum. & Koidz. | R.R. Kowal 3092 | WIS |
GU818593 | Luina hypoleuca Benth. | W. Greuter 17706 | – |
GU818595 | Mikaniopsis clematoides (Sch. Bip. ex A. Rich.) Milne-Redh. A | W.J.J.O. de Wilde & B.E.E. de Wilde-Duyfjes 9006 | – |
GU817581 | Mikaniopsis clematoides (Sch. Bip. ex A. Rich.) Milne-Redh. B | I. Friis et al. 499 | – |
EF538266 | Nesampelos lucens (Poir.) B. Nord. | Zanoni 45570 | JBSD |
EF538267 | Nordenstamia kingii (H. Rob. & Cuatrec.) B. Nord. | B. Stahl 5572A | S |
EF538271 | Oldfeltia polyphlebia (Griseb.) B. Nord. & Lundin | B. Nordenstam & R. Lundin 340 | S |
AF459960 | Othonna capensis L. H. Bailey | P.B. Pelser cult. 106 | S |
GU818608 | Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve | M.A. Vincent 8581 | MU |
EF538283 | Pentacalia arborea (Kunth) H. Rob. & Cuatrec. | B. Ollgaard & H. Balslev 8298 | MU |
GU818627 | Pippenalia delphiniifolia (Rydb.) McVaugh | Spellenberg & Bacon 11048 | – |
GU818629 | Psacaliopsis purpusii (Greenm. ex Brandegee) H. Rob. & Brettell | Panero et al. 2607 | – |
GU818631 | Roldana suffulta (Greenm.) H. Rob. & Brettell | Rzedowski 36569 | – |