Shrubs or trees. Leaves decussate or opposite. Inflorescences terminal or axillary, sometimes cauliflorous, capitate, fascicled or umbelliform, peduncled, rarely sessile, peduncles usually with decussate, persistent, reddish-brown, glabrous bracteoles towards the base and gradually increasing in size and more spaced towards the upper parts, sometimes 4 or more involucral bracts at the uppermost part of the peduncle surrounding the flowers. Flowers monomorphous rarely heteromorphous, white, sessile, articulated at the base. Floral tube infundibuli-form or cylindric, glabrous or puberulous on both surfaces. Calyx lobes 5, rarely 4 or 6, slightly unequal. Petaloid appendages obscure and rim-like, or none, rarely distinct (P. pentecostalis LEANDRI, an extra-Mal. sp.). Stamens in two series, usually filamentous and exserted, sometimes included, rarely sessile; anthers oblong, dorsifixed. Disk cupular, submembranous. Ovary ovoid or ellipsoid, glabrous or hairy at the apex, 2-celled or rarely 1-celled by abortion, once found 3-celled in P. octandra; style terminal, filiform, sometimes exserted; stigma capitate, papillose. Fruits drupaceous, 2-or 1-seeded, exocarp and mesocarp fibrous and fleshy (sometimes hard in the herbarium), endocarp coriaceous and hard. Seeds exalbuminous; cotyledons thick and hemispherical.
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Shrubs or trees. Stems glabrous. Leaves opposite, often decussate, petiolate, glabrous. Inflorescence of axillary or lateral clusters and/or terminal clusters, each pedunculate or rarely sessile, usually with persistent small bracts at base and 2 or more involucral bracts at summit of peduncle. Flowers bisexual; pedicel short or absent, articulate at apex, glabrous. Hypanthium nearly cylindrical, not persistent. Sepals 4, 5 or rarely 6, densely hairy inside (in Australia). Corolla lobes minute or absent. Stamens c. twice as many as sepals, an upper whorl inserted at summit of hypanthium opposite sepals and a lower whorl inserted in throat alternate to sepals. Ovary 2-locular or rarely (not in Australia) 1-locular; style terminal. Fruit a succulent drupe.