Large trees to shrubs. Buttresses absent. Spines absent. Stilt roots absent. Bark cream, gray, brown; not peeling in strips. Slash yellow, brown. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate absent. Terminal buds not enclosed by leaves.
Complex hairs present, or absent; star-like. Stinging hairs absent. Mature twig indumentum present; dense.
Leaves opposite, or spiral, or two-ranked; not scale-like; simple; all of the same type; not modified into spines; coriaceous; gland-dotted, or not gland-dotted; very asymmetric at the base; not dissected; smooth margined, or wavy margined, or with small to large teeth on margin. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent. Smallest veins prominent; ladder like. Intramarginal vein absent. Stalk of blade less than a quarter the length of the blade to more than half 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; dense.
Inflorescences present; axillary; 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. Perianth present; with distinct calyx and corolla whorls. Sepals (4-)5-6(-8); partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; (4-)5-6(-8); all joined; not fleshy; deciduous; not stalked; entire. Stamens (4-)5-6(-8); filaments present; 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 short slits (apical). Ovary superior. Carpels joined; (3-)5. Locules (3-)5. Styles solitary. Stigmas 4-5 lobed; not distinctive. Fruit drupaceous; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds (6-)10 per fruit; less than 5 mm; wingless; uniform in cross-section; aril absent; non-endospermic.
Leaves densely hairy, opposite and alternate on the same twig; leaves with prominent scalariform tertiary venation. Taxon images: geunsia.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.