Small trees to shrubs. Buttresses absent. Spines absent. Stilt roots absent. Bark gray, black; peeling in strips. Exudate absent. Terminal buds not enclosed by leaves.
Complex hairs absent. Stinging hairs absent. Mature twig indumentum absent.
Leaves two-ranked; not scale-like; simple; all of the same type; not modified into spines; paper-like; gland-dotted; symmetric at the base; not dissected; smooth margined. Epidermis not waxy. Venation pinnate. Secondary veins closed; prominent. Smallest veins prominent, or not prominent, but visible; ladder like. Intramarginal vein absent. Stalk of blade absent. Stipules absent. Domatia absent. Basal glands absent. Hairs on mature leaf present; dense, or sparse.
Inflorescences present; axillary; the flowers from a single point on the stem; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; stalked; about 0.5 cm long or across to to about 3 cm long or across; round; with male or female parts not raised on a column. Hypanthium absent. Disk absent. Perianth present; with distinct calyx and corolla whorls. Sepals 3; free; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 6; free; not fleshy; deciduous; stalked; entire. Stamens 3, or 6, or 9, or 12; filaments absent; free of the perianth; all equal in size; anisomerous, or isomerous, or diplostemonous. Anthers 2 loculed; not awned; dehiscing by short slits. Ovary superior. Carpels separate; 3-12. Locules 1. Styles solitary. Stigmas 1 lobed; distinctive; head shaped. Fruit drupaceous; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1-4 per fruit; less than 5 mm to about 1 cm long; wingless; with folds like marble, in cross- section; aril absent; endospermic.
Flowers small for the family; stamens and carpels few, less than 12; leaves thin and gland dotted. Taxon images: orophea.gif
Cite this publication as: Jarvie, J.K. and
Ermayanti (1996 onwards). `Tree Genera of Borneo - Descriptions and
Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.