Pterisanthes Blume (1825: 192)

Parnell, A. N., 2014, A taxonomic revision of Pterisanthes (Vitaceae) in Thailand and a new Thai record for Pterisanthes cissioides, Phytotaxa 159 (2), pp. 95-104 : 96

Pterisanthes Blume (1825: 192) .

Type:— Pterisanthes cissioides Blume.

Embamma Griffith (1854: 694) .

Vitis L. sect. Pterisanthes Miquel (1863: 73) .

Slender wiry climbers. Stem slender, cylindrical, striate, glabrous. Leaves simple or palmately (2)3–7-foliolate, some species heterophyllous. Inflorescence a leaf-opposed flat lamellate panicle, leaf-like and slightly fleshy with associated tendrils at the peduncle; lamella shape very variable: horseshoe-shaped, rectangular, rounded to very narrow. Flowers in Sect. Pterisanthes lamellate and pedicellate, in Sect. Paginiflora lamellate; lamellate flowers hermaphrodite, sessile, partially embedded in the lamella, (3)-4-5-merous, calyx obscure, corolla petals ovatetriangular, ovary adnate to the disk; pedicellate flowers placed at the margin of the lamella, either male or sterile always 4-merous, calyx cupuliform; corolla petals ovate-oblong; filaments filiform, attached to the inner side of the petal by a thin membrane; anthers minute; ovary exserted; style short; stigma inconspicuous. Seeds obovate, rugose.

Distribution: — Brunei Darussalam, Indonesia (Java, Kalimantan, Sumatra), Malaysia (Peninsula, Sabah, Sarawak), Myanmar (Peninsula), Philippines (Mindanao), Singapore, Thailand (Ranong, Songkhla, Narathiwat).

Key to Thai species

1. Pedicellate flowers absent; leaves with a ferruginous margin; petioles 1–3 cm long ........................... Pterisanthes eriopoda

- Pedicellate flowers present; leaves without a ferruginous margin; petioles 3–7 cm long ..................................................... 2

2. Leaves simple and glabrous; lamella 1–3 cm wide .................................................................................... Pterisanthes polita

- Leaves compound with abaxial side ferruginous; lamella 3–7 cm wide ............................................. Pterisanthes cissioides