Dioecious scandent shrubs or lianas. Leaves spirally arranged, glandular-repand-dentate and penninerved. Flowers small, sessile, bracteate, in lax supra-axillary spikes. Sepals or calyx 0. Petals connate at base, valvate in bud, persistent in ♀ flowers. Seed 1.
Asia-Temperate:, Hainan (Hainan ‒ present) Asia-Tropical:, Philippines (Philippines ‒ present) Ceylon: present Madagascar: present S. India: present tropical and subtropical Africa: present
About 20 spp., most of them in tropical and subtropical Africa&Madagascar, 1 sp. (P. volubilis WIGHT) in S. India and Ceylon, Indo-China and Hainan; in Malesia: 1 sp. in the Philippines.