Alectryon

Family Sapindaceae. Order Sapindales.

Large trees to shrubs. Buttresses present, or absent; short. 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 absent. Terminal buds not enclosed by leaves.

Complex hairs absent. Stinging hairs absent. Mature twig indumentum present, or absent; dense, or sparse.

Leaves spiral; not scale-like; compound; with three leaflets; without a terminal leaflet; leaflets opposite, or leaflets alternate; all of the same type; not modified into spines; coriaceous; not gland-dotted; very asymmetric at the base, or symmetric at the base; not dissected; with small to large teeth on margin. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent, or not prominent, but visible. Smallest veins prominent, or not prominent, but visible; net 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 absent. Basal glands absent. Hairs on mature leaf present, or absent; dense, or sparse.

Inflorescences present; axillary; 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; with the parts barely visible to the eye to about 0.5 cm long or across; round; with male or female parts raised on a column, or not raised on a column; with the female parts of the flower raised on a stalk. Hypanthium absent. Disk present, or absent; the stamens inside the disk. Perianth present; with distinct calyx and corolla whorls, or with all whorls looking like sepals. Sepals 4-5(-6); partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present, or absent; 4-5; free; not fleshy; deciduous; stalked (short); entire. Stamens (5-)8; filaments present; free of each other; free of the perianth; all equal in size; diplostemonous. Anthers 2 loculed; attached by the base; not awned; dehiscing by long slits. Ovary superior. Carpels joined. Locules (1-)2-4(-5). Styles solitary. Stigmas 2-3 lobed; not distinctive. Fruit capsular; non-fleshy; not multiple; splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1-5 per fruit; less than 5 mm to about 1 cm long; wingless; uniform in cross-section; aril absent; non-endospermic.

Paripinnate leaves; fruit splitting, often lobed; sarcotesta usually present. Taxon images: alectry.gif


Cite this publication as: Jarvie, J.K. and Ermayanti (1996 onwards). `Tree Genera of Borneo - Descriptions and Illustrations' URL http://django.harvard.edu/users/jjarvie/Borneo.htm/.
Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993) should also be cited.