Small trees to shrubs, or climbers. Buttresses absent. Spines absent. Stilt roots absent. Bark brown; not peeling in strips. Exudate absent. Terminal buds not enclosed by leaves.
Complex hairs present, or absent; star-like. Stinging hairs absent. Mature twig indumentum absent.
Leaves opposite; not scale-like; simple; all of the same type; not modified into spines; coriaceous, or paper-like; not gland-dotted; symmetric at the base; not dissected; smooth margined, or with small to large teeth on margin. Epidermis not waxy. Venation pinnate, or trinerved. Secondary veins open; prominent. Smallest veins prominent, or not prominent, but visible; net like, or ladder 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. Stipules absent. Domatia present, or absent; pit-like; scattered along midrib. Basal glands absent. Hairs on mature leaf present, or absent; dense, or sparse.
Inflorescences present; terminal; on a branched axis; specialized inflorescence units present, or absent; specialized inflorescence units corymbs; 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 absent. Perianth present; with distinct calyx and corolla whorls. Sepals 5; partially joined; 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; joined to the perianth (corolla); all equal in size; isomerous; opposite the sepals (when isomerous). Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary inferior. Carpels joined; 3. Locules 1. Styles solitary. Stigmas 3 lobed; not distinctive. Fruit drupaceous; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1 per fruit; less than 5 mm to about 1 cm long; wingless; with folds like marble, in cross- section, or uniform in cross-section; aril absent; endospermic.
Leaves simple, opposite and entire or toothed; flowers small and in terminal inflorescences; ovary inferior; 3 stigmas. Taxon images: viburnum.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.