A key to the eight Passiflora species, photographs, and their scientific name revisions are provided below to aid their identification. 1 Stems with 4 broad acute wings ................................................................................................................ Passiflora quadrangularis - Stems without wings ..........................................................................................................................................................................2 2 Leaves with ocelli.................................................................................................................................................... Passiflora biflora - Leaves without ocelli..........................................................................................................................................................................3 3 Petioles without glands; bracts deeply pinnatisect .............................................................................................................................4 - Petioles with glands; bracts not pinnatisect, or absent .......................................................................................................................5 4 Ovary glabrous; fruit orange ................................................................................................................................ Passiflora vesicaria - Ovary pubescent; fruit green .......................................................................................................... Passiflora foetida var. tainaniana 5 Leaf margins serrate .................................................................................................................................................. Passiflora edulis - Leaf margins entire.............................................................................................................................................................................6 6 Leaves 3-lobed; flowers without petals....................................................................................... Passiflora suberosa subsp. litoralis - Leaves undivided; flowers with petals ...............................................................................................................................................7 7 Leaves elliptic...................................................................................................................................................... Passiflora laurifolia - Leaves cordate....................................................................................................................................................... Passiflora ligularis

Published as part of Chen, Wei-Chih, Chung, An-Ching, Wang, Chih-Chiang, Yang, Sheng-Zehn & Chen, Po-Hao, 2022, Passiflora (Passifloraceae) in Taiwan, pp. 79-83 in Phytotaxa 538 (1) on page 79, DOI: 10.11646/phytotaxa.538.1.7, http://zenodo.org/record/6332020