Description: Climbing herb, to 6 m long, growing from a rootstock; branches glabrous; dioecious or monoecious. Stipules ca 1 mm long. Leaves entire, ovate, oblong to lanceolate, or deeply 2–7-lobed, 3–20 x 2.5–27 cm; lobes lanceolate or linear, 2–14 cm long; base cordate to truncate; glands at base 2; petioles 1.5–6 cm long. Inflorescences cymose, peduncle 3–15 cm long, in male up to 25-flowered, in female 2–5-flowered; tendrils 3, up to 15 cm long. Bracts and bracteoles minute. Male flowers: pedicel 0.5–2 cm long; flower campanulate, 1.2–2 cm lomg, stipe 4–7 mm long; hypanthium to 3 mm long; sepals 5, triangular-lanceolate, to 1.3 cm long, entire; petals 5, ovate 6–10 mm long, obtuse, unguiculate, 3-nerved, finely serrulate-laciniate; stamens 5, inserted at the base of the hypanthium, 3–5.5 mm long, connate at as; anthers 2–4 mm long; corona densely feather-branched hairs, to c. 1 mm long; disc glands. Female flowers: pedicels 4–7 mm long; flower campanulate, 0.7–1.5 cm long, stipe 1–5 mm long; gynophore to 1.5 mm long; ovary superior, ellipsoid, 3–6-angular, 2–4 mm long; styles connateat base, arms c. 1 mm long; stigmas subglobose, woolly-papillate. Fruit 1–3 per infructescence, ellipsoid, 2.5–4.2 cm long; gynophore 0.5–1 cm long, pericarp c. 0.5 mm thick. Seeds 12–25, ovoid, 5–8 mm long, pitted.

Thai name: หญ้านิ้วมือผี (Ya nio mue phi)

Photos: Rachn Pooma (Doi Inthanon, Chiang Mai)