Vincetoxicum Wolf 1776
Creators: name: Hsu, Tian-Chuan
name: Huang, Wei-Jie
name: Chung, Shih-Wen
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Apocynaceae
Vincetoxicum

description: A key to the species is also provided as below to aid their identification.
1. Stems erect; peduncles shorter than 1 cm .......................................................................................................... Vincetoxicum atratum
- Stems twining or prostrate; peduncles longer than 2 cm ...................................................................................................................2.
2. Stems prostrate; leaves nearly orbicular.................................................................................................................... Vincetoxicum sui
- Stems twining; leaves linear-lanceolate to ovate...............................................................................................................................3.
3. Corolla lobes oblong-lanceolate, 6–10 mm long...............................................................................................................................4.
- Corolla lobes ovate, 2–4 mm long.....................................................................................................................................................5.
4. Stems puberulent along two lines; leaves sparsely puberulent on main veins and along margin, otherwise glabrous; corolla yellow-white ..................................................................................................................................................................... Vincetoxicum fordii
- Stems and leaves uniformly pubescent; corolla purple or at least purplish at base ................................... Vincetoxicum mooreanum
5. Leaves obtuse to rounded at base, subtrinerved; calyx with 5 colleters inside ................................................ Vincetoxicum oshimae
- Leaves rounded to subcorded at base, pinnately veined; calyx without colleters .............................................................................6.
6. Plant glabrous except for very young stems................................................................................................ Vincetoxicum taiwanense
- Plants variously hairy ........................................................................................................................................................................7.
7. Leaves lanceolate, 0.8–2.1 cm wide, usually> 3× as long as broad.................................................................................................8.
- Leaves ovate, 1.5–4.0 cm wide, usually <3× as long as broad.........................................................................................................9.
8. Peduncles and pedicels pubescent ................................................................................................................. Vincetoxicum insulicola
- Peduncles and pedicels glabrous ............................................................................................................................... Vincetoxicum lui
9. Stems densely pubescent; leaves pubescent on both surfaces......................................................................... Vincetoxicum hirsutum
- Stems sparsely pubescent; leaves glabrescent................................................................................................... Vincetoxicum brownii
description: Published as part of Hsu, Tian-Chuan, Huang, Wei-Jie & Chung, Shih-Wen, 2021, Vincetoxicum (Apocynaceae: Asclepiadoideae) in Taiwan: Two new combinations and a new record, pp. 287-290 in Phytotaxa 478 (2) on page 287, DOI: 10.11646/phytotaxa.478.2.11, http://zenodo.org/record/5413120