 |
| Cynanchum brevipedunculatum J. Y. Shen
in Shen, Ma, Wang & Shi, 2019
|
Abstract
Cynanchum brevipedunculatum (Apocynaceae), a new species from Menghai, Yunnan, China, is described and illustrated. It is compared with two morphologically similar species, Cynanchum decipiens and C. longipedunculatum. Cynanchum brevipedunculatum differs from the preceeding species in having much bigger leaves, adaxially sparsely strigillose, abaxially glabrous or sparsely strigillose on veins, shorter peduncle and the very distinctive bowl-shaped corona. A comprehensive morphological description of C. brevipedunculatum is provided, together with photographs, and a conservation assessment for this rare vine species.
Keyword: Apocynaceae, Asclepiadeae, China, Cynanchum brevipedunculatum, Xishuangbanna, Yunnan
 |
| Fig. 1. Cynanchum brevipedunculatum J. Y. Shen. A. Habit. B-C. Adaxial and abaxial leaf surface. D-E. Inflorescences and flowers. F. Gynostegium in side view. G. Gynostegium in top view. H. Pollinarium. |
Cynanchum brevipedunculatum J. Y. Shen, sp. nov.
短梗豹藥藤
Type: CHINA, Yunnan, Menghai, Bada, Hesong village, roadside, climbing on the tree, 21°50′N, 100°7′E, alt. 1905 m, 18 Nov. 2018, Shen Jian-Yong 1352 (holotype: HITBC; isotype: HIB, TAI).
Diagnosis: C. brevipedunculatum can be distinguished from its closest morphological matches C. decipiens and C. longipedunculatum, by several morphological features (Table 1), C. brevipedunculatum has bigger (compared to 5–8 × 2–4 cm in C. decipiens and ca. 5.6 × 2.3 cm in C. longipedunculatum) leaves (12–20 × 6–11 cm), adaxially sparsely strigillose and abaxially glabrous or sparsely strigillose on the veins, and with a shorter (compared to 4–10 cm in C. decipiens and 6–9 cm in C. longipedunculatum) peduncle (1.8–2.2 cm).
Distribution & habitat: Currently known only from
the type locality and found growing beside the road, not
in a protected area, at ca. 1900 m high elevation.
Etymology: The peduncle of this species is short (1.8–
2.2 cm), thus the specific epithet “brevipedunculatum” was
chosen. Chinese name is “短梗豹藥藤” (duǎn gěng bào
yào téng), which means the plant is poisonous and has
short peduncle.
Jian-Yong Shen, Xing-Da Ma, Wen-Guang Wang and Ji-Pu Shi. 2019. Cynanchum brevipedunculatum, A New Species of Apocynaceae from Yunnan, China. Taiwania. 64(3); 217-220. DOI: 10.6165/tai.2019.64.217
