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Usually trees or shrubs, sometimes scandent. Leaves opposite, entire or toothed. Flowers small, often polygamous, in panicles or corymbose cymes. Calyx truncate or cup-shaped, minutely 2-5 toothed, occasionally lipped. Corolla small, tube short, throat hairy inside, limb 2-lipped or subequally 4 or 5-lobed. Stamens 4, didynamous, anther cells parallel or divergent. Ovary 2- or 4-celled, 4-ovuled, styles linear, stigmas shortly bifid. Fruit a small drupe, globose or obovoid, with 1-4 celled stone, seated on the calyx. Seeds oblong, exalbuminous.

Key to the species

Serial Key Reference
1a. Inflorescence elongate, spiciform or thyrosoid P. bracteata
1b. Inflorescence a corymb or panicle 2
2a. Calyx truncate or nearly so 3
2b. Calyx distinctly toothed or lipped 4
3a. Leaves coriaceous; calyx minutely pubescent P. coriacea
3b. Leaves membranous; calyx glabrous P. scandens
4a. Calyx manifestly 2-lipped, one lip 2-toothed, the other entire 5
4b. Calyx indistinctly 2-lipped or uniform, 5 or less often 4-toothed 6
5a. Leaves subobtuse, broadly oblong or ovate, undulate or coarsely toothed; corymbs dense, minutely hairy P. serratifolia
5b. Leaves acute, ovate, entire; corymbs compound, pubescent P. longifolia
6a. Short-stemmed shrubs; leaves entirely glabrous P. esculenta
6b. Trees; leaves hairy or tomentose 7
7a. Branchlets, leaves and inflorescence tomentose; petiole 5-8 cm long; deciduous tree P tomentosa
7b. Leaves on the upper side often with shining glandular dots and with dense stellate hairy on midrib; petiole 1.0- 3.5 cm long; evergreen tree P. bengalensis