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

被引：0
|
作者：
Yuan, Qiong [1 ,2 ,3 ]
Zeng, You-Pai [1 ,2 ,3 ]
Fei, Wen-Qun [1 ,2 ]
Yang, Qin-Er [1 ,2 ]
机构：
[1] Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable U, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China
[2] Chinese Acad Sci, Ctr Conservat Biol, South China Bot Garden, Core Bot Gardens, Guangzhou 510650, Guangdong, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
PHYTOTAXA | 2021年 / 511卷 / 03期
基金：
中国国家自然科学基金;
关键词：
geographical distribution; morphology; taxonomy; Thalictrum scabrifolium; Thalictrum yunnanense;
D O I：
10.11646/phytotaxa.511.3.4
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
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, paniculatecorymbiform 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.
引用
收藏
页码：248 / 260
页数：13
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