Small trees to shrubs. Buttresses absent. Spines absent. Stilt roots absent. Bark gray, brown; not peeling in strips. Exudate absent. Terminal buds not enclosed by leaves.
Complex hairs absent. Stinging hairs absent. Mature twig indumentum absent.
Leaves opposite, or whorled; 3 per whorl; not scale-like; simple; all of the same type; not modified into spines; coriaceous; not gland-dotted; symmetric at the base; not dissected; smooth margined. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent. Smallest veins not prominent, but visible; net like. Intramarginal vein absent. Stalk of blade less than a quarter the length of the blade; not winged; attached to base of leaf blade; not swollen. Stipules present; joined; joined across twigs; encircling the twig; leafy; not fringed; large to small; not persistent. Domatia absent. Basal glands absent. Hairs on mature leaf present, or absent; sparse.
Inflorescences present; terminal; on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; stalked; about 0.5 cm long or across; round; with male or female parts not raised on a column. Hypanthium absent. Disk present. Perianth present; with distinct calyx and corolla whorls. Sepals 5(-6); partially joined; persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 5(-6); all joined; not fleshy; deciduous; not stalked; entire. Stamens 5(-6); filaments present, or filaments absent; free of each other; joined to the perianth; all equal in size; isomerous; opposite the sepals (when isomerous). Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 2(-3). Locules 2(-3). Styles solitary. Stigmas 2 lobed; distinctive; club shaped. Fruit capsular; non-fleshy; not multiple; splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 100 per fruit (many); barely visible; winged; uniform in cross-section; aril absent; endospermic.
Stipules triangular or constricted in the middle - dimorphic; fruits splitting loculicidally into 2; seeds small, numerous, compressed. Taxon images: wendland.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.