Cissampelos

Zhou, Ya-Dong, Mbuni, Yuvenalis, Hu, Guang-Wan, Zhong, Zhi-Xiang, Yan, Xue, Mwachala, Geoffrey & Wang, Qing-Feng, 2017, Cissampelos keniensis (Menispermaceae), a new species from Mt. Kenya, East Africa, Phytotaxa 292 (1), pp. 57-64 : 63

Key to the species of Cissampelos in tropical East Africa

1. Leaves subpeltate (petioles inserted less than 5 mm above the base of the blade)............................................................................2

- Leaves clearly peltate (petioles inserted more than 5 mm above the base of the blade)....................................................................6

2. Leaves rounded, emarginate or obtuse at the apex.............................................................................................................................3

- Leaves clearly acuminate at the apex.................................................................................................................................................5

3. Branchlets sparsely hairy; leaves reniform to deltoid, glabrous........................................................................................ C. torulosa

- Branchlets pubescent to puberulous; leaves cordate or suborbicular.................................................................................................4

4. Leaves cordate to suborbicular; synandrium 4-locular; endocarp small, ca. 4 × 3.5 mm ................................................... C. pareira

- Leaves cordate; synandrium (6–)8(–9)-locular; endocarp large, ca. 6 × 4 mm ............................................................. C. mucronata

5. Leaves ovate-elliptic; indumentum of the leaf abaxial surface sparse ........................................................................... C. friesiorum

- Leaves cordate; indumentum of the leaf abaxial surface dense ....................................................................................... C. keniensis

6. Petioles less than 25 mm long ......................................................................................................................................... C. rigidifolia

- Petioles more than 40 mm long..........................................................................................................................................................7

7. Leaves ovate to suborbicular; male inflorescences up to 400 mm long........................................................................ C. owariensis

- Leaves cordate; male inflorescences less than 50 mm long............................................................................................ C. rigidifolia