Large trees to shrubs. Buttresses present, or absent; short. Spines absent. Stilt roots absent. Bark red, brown; not peeling in strips. Slash yellow, red, brown. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate present; white; flowing, or spotty; not blackening on exposure to air. Terminal buds not enclosed by leaves.
Complex hairs present; disk-shaped, or star-like. Stinging hairs absent. Mature twig indumentum present, or absent; dense, or sparse.
Leaves spiral; not scale-like; simple, or compound; pinnate; with a terminal leaflet; leaflets opposite, or leaflets alternate; all of the same type; not modified into spines; coriaceous, or paper-like; gland-dotted, or not gland-dotted; very asymmetric at the base, or symmetric at the base; not dissected; smooth margined. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent, or not prominent, but visible. Smallest veins prominent, or not prominent, but visible; net like. Intramarginal vein present, or absent. Stalk of blade less than a quarter the length of the blade; not winged; attached to base of leaf blade; not swollen, or swollen; swollen at one end. Stipules absent. Domatia present, or absent; appearing as hair tufts; scattered along midrib. Basal glands absent. Hairs on mature leaf present; dense, or sparse.
Inflorescences present; axillary, or on the trunk or branches; on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts present at the bottom of the inflorescence, or absent. Flowers at least some flowers unisexual; with male and female flowers on different plants; not stalked, or stalked; about 0.5 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 3-5(-6); partially joined; persistent in fruit, or not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 3-5(-6); free, or all joined; fleshy, or not fleshy; deciduous; not stalked; entire. Stamens 5-8(-100) (many); filaments present; joined; free of the perianth; all equal in size; isomerous, or diplostemonous, or polystemonous. Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 1-3(-10). Locules 1-3(-10). Styles absent. Stigmas 1-3 lobed; distinctive, or not distinctive; head shaped, or disk-like. Fruit berry-like; fleshy, or non-fleshy; not multiple; splitting, or not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1-4(-10) per fruit; less than 5 mm, or about 1 cm long; wingless; uniform in cross-section; aril present, or aril absent (rarely); non-endospermic.
Small to large trees; latex often present, white and not copious; indumentum of scales or stellate hairs. Taxon images: genaglai.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.