Large trees to small trees. Buttresses present, or absent; short. Spines absent. Stilt roots absent. Bark green, gray, brown, black; not peeling in strips. Slash orange, red, gray, brown. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate present, or absent; white; spotty; not blackening on exposure to air. Terminal buds not enclosed by leaves.
Complex hairs present, or absent; disk-shaped. Stinging hairs absent. Mature twig indumentum present, or absent; dense, or sparse.
Leaves spiral; not scale-like; compound; pinnate; without a terminal leaflet; leaflets opposite, or leaflets alternate; 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; not prominent, but visible. Smallest veins not prominent, but visible; net like. Intramarginal vein present. Stalk of blade less than a quarter the length of the blade; not winged; attached to base of leaf blade; not swollen. Stipules absent. Domatia absent. Basal glands absent. Hairs on mature leaf present, or absent; dense, or sparse.
Inflorescences present; axillary, or on the trunk or branches; on an unbranched axis, or on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual, or at least some flowers unisexual; with male and female flowers on the same plant; stalked; about 0.5 cm long or across; round; with male or female parts not raised on a column. Hypanthium absent. Disk present, or absent; the stamens outside the disk. Perianth present; with distinct calyx and corolla whorls. Sepals 3-6; partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; (3-)4-6(-14) (1-2 rows); free, or all joined; not fleshy; deciduous; not stalked; entire. Stamens (3-)4-30(-100) (many); filaments present; joined; free of the perianth, or joined to the perianth; all equal in size; isomerous. Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 2-5(-8). Locules 2-5(-8). Styles solitary. Stigmas 1 lobed; not distinctive. Fruit capsular; fleshy; not multiple; splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1(-2) per fruit; less than 5 mm, or about 1 cm long; wingless; uniform in cross-section; aril present; non-endospermic.
Leaves appear paripinnate, but end in a distinctive terminal bud which continues growing. Taxon images: genchiso.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.