Large trees to small trees. Buttresses absent. Spines absent. Stilt roots absent. Bark gray, brown; not peeling in strips. Slash red. 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, or absent; disk-shaped. Stinging hairs absent. Mature twig indumentum absent.
Leaves spiral; 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, or closed; not prominent, but visible. Smallest veins not prominent, but visible, or not 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.
Inflorescences present, or represented by solitary flowers only; axillary, or leaf-opposed; 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, or 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 5; free; persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 5; all joined; not fleshy; deciduous; not stalked; entire. Stamens 5; filaments present; free of each other; free of the perianth; all equal in size; isomerous; alternating with the sepals (when isomerous). Anthers 2 loculed; attached along the side, or attached by the base; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 6. Locules 6. Styles solitary. Stigmas 1 lobed; not distinctive. Fruit berry-like; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 100 per fruit (many); less than 5 mm; wingless; uniform in cross-section; aril absent; non-endospermic.
Leaves set apart; exstipulate; parts in 5’s. Taxon images: genchrys.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.