Small trees to shrubs. Buttresses present, or absent; short. Spines present, or absent; on trunk, or on branches. Stilt roots absent. Bark red, 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 spiral; not scale-like; compound; with three leaflets; with a terminal leaflet; leaflets opposite; all of the same type; not modified into spines; coriaceous; gland-dotted; symmetric at the base; not dissected; smooth margined. Epidermis waxy. Venation pinnate. Secondary veins open; prominent. Smallest veins prominent, or not prominent, but visible; net like. Intramarginal vein absent. Stalk of blade less than a quarter the length of the blade; not winged; attached to base of leaf blade; swollen; swollen at one end. Stipules present; free from one another; laterally placed; not encircling the twig; scale-like; not fringed; small; not persistent. Domatia absent. Basal glands present. Hairs on mature leaf absent.
Inflorescences present; terminal, or axillary; on an unbranched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; stalked; to about 3 cm long or across to to about 10 cm long or across; with one plane of symmetry; with male or female parts raised on a column; with the female parts of the flower raised on a stalk. Hypanthium absent. Disk absent. Perianth present; with distinct calyx and corolla whorls. Sepals 5; partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 5; some joined; not fleshy; deciduous; stalked; entire. Stamens 10; filaments present; joined (9 joined and 1 free); free of the perianth; of different sizes (5 long alternating with 4 short); diplostemonous. Anthers 2 loculed; attached along the side; not awned; dehiscing by short slits, or dehiscing by long slits. Ovary superior. Carpels solitary; 1. Locules 1. Styles solitary. Stigmas 1 lobed; distinctive; head shaped. Fruit legume-like; non-fleshy; not multiple; splitting, or not splitting; not enclosed in, or sitting on, fleshy perianth parts; winged. Seeds 4-10 per fruit; about 1 cm long; wingless; uniform in cross-section; aril absent; non-endospermic.
Trifolate leaves with prominent glands at the base of the leaflet stalk; spines on branches and trunks; flowers large, red-purple-black colored; stamens exserted well beyond petals. Taxon images: erythrin.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.