Thalictrum changii (Ranunculaceae), a new species from southern Xizang (Tibet), China

YOU-PAI ZENG; WEN-QUN FEI; QIONG YUAN; QIN-ER YANG

doi:10.11646/phytotaxa.511.3.4

Issue: Vol. 511 No. 3: 19 July 2021

Type: Article

Published: 2021-07-19

DOI: 10.11646/phytotaxa.511.3.4

Page range: 248–260

Abstract views: 30

PDF downloaded: 1

Thalictrum changii (Ranunculaceae), a new species from southern Xizang (Tibet), China

YOU-PAI ZENG⁺⁻
WEN-QUN FEI⁺⁻
QIONG YUAN⁺⁻
QIN-ER YANG⁺⁻

Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China, Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China, University of Chinese Academy of Sciences, Beijing 100049, China

Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China, Center of Conservation Biology, Core Botanical Gardens, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China

Eudicots geographical distribution morphology taxonomy Thalictrum scabrifolium Thalictrum yunnanense

Requires Subscription or Fee PDF (14MB)

Abstract

Thalictrum changii (Ranunculaceae), a new species from southern Xizang (Tibet), China, is illustrated and described. Morphologically, T. changii is most closely similar to T. yunnanense in habit and in having 2–3-ternate leaves, paniculate-corymbiform inflorescence, clavate filaments, sessile, fusiform achenes, and glandular-pubescent leaves, inflorescence rachis, pedicels and achenes, but differs by having subcoriaceous (vs. papery) leaflets, narrowly elliptic (vs. suborbicular), longer (ca. 5 mm vs. ca. 3.5 mm) and persistent (vs. caducous) sepals, and longer (ca. 3 mm vs. ca. 1.5 mm) carpels with longer (ca. 1.5 mm vs. ca. 0.5 mm) styles. The confusion in the geographical distribution of T. yunnanense and its closely allied species T. scabrifolium is clarified. Morphological distinction between the two varieties of T. yunnanense, namely var. yunnanense and var. austroyunnanense, is discussed. An identification key to T. changii and its closely allied taxa is also provided.

References

Franchet, A. (1886) Plantas Yunnanenses a cl. J. M. Delavay collectas enumerat novasque describit (1). Bulletin de la Société Botanique de France 33: 358–467. https://doi.org/10.1080/00378941.1886.10828470 Fu, D.Z. & Zhu, G.H. (2001) Thalictrum Linnaeus. In: Wu, Z.Y., Raven, P.H. & Hong, D.Y. (Eds.) Flora of China, vol. 6. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 282–302. Hooker, J.D. & Thomson, T. (1855) Ranunculaceae. In: Flora Indica, vol. 1. W. Pamplin, London, pp. 1–60. https://doi.org/10.5962/bhl.title.50109 IUCN Standards and Petitions Committee (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. IUCN Standards and Petitions Committee. Linnaeus, C. (1753) Species Plantarum. Laurentii Salvii, Holmiae, 1200 pp. Qian, Y.Y. (1997) New taxa and a newly recorded variety of Ranunculaceae from Yunnan, China. Acta Phytotaxonomica Sinica 35: 262–264. Wang, W.T. (1994) Notulae de Ranunculaceis sinensibus (XVII). Acta Phytotaxonomica Sinica 32: 467–479. Wang, W.T. (2000) Thalictrum L. In: Wu, Z.Y. (Ed.) Flora Yunnanica, vol. 11. Science Press, Beijing, pp. 153–177. Wang, W.T. (2018) Thalictrum (Ranunculaceae) in China. Peking University Press, Beijing, 376 pp. Wang, W.T. & Wang, S.H. (1979) Thalictrum L. In: Anonymous (Ed.) Flora Reipublicae Popularis Sinicae, vol. 27. Science Press, Beijing, pp. 502–592.