Xylocarpus

Family Meliaceae. Order Sapindales.

Large trees to small trees. Buttresses present, or absent; short. Spines absent. Stilt roots present, or absent. Bark white, cream, gray; not peeling in strips. Slash orange, 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 absent.

Leaves spiral; not scale-like; compound; with three leaflets, or pinnate; without a terminal leaflet; leaflets opposite; all of the same type; not modified into spines; coriaceous to leathery; not gland-dotted; symmetric at the base; not dissected; smooth margined. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent, or not prominent, but visible. Smallest veins not prominent, but 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 absent.

Inflorescences present; axillary; on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers at least some flowers unisexual; with male and female flowers on the same plant; stalked; about 0.5 cm long or across; round; with male or female parts not raised on a column. Hypanthium absent. Disk present; the stamens outside the disk. Perianth present; with distinct calyx and corolla whorls. Sepals 4; partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 5; free; not fleshy; deciduous; not stalked; entire. Stamens 8; filaments present; joined; free of the perianth; all equal in size; diplostemonous. Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 4(-5). Locules 4(-5). Styles solitary. Stigmas 4 lobed; distinctive; head shaped (discoid). Fruit capsular; non-fleshy; not multiple; splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 5-20(-100) per fruit (many); much more than 1 cm long; wingless; uniform in cross-section; aril absent; non-endospermic.

Maritime trees, sometimes with aerial roots; leaves paripinnate; flowers generally 4-merous; fruits large capsules; seeds large and covered in a corky layer. Taxon images: xylocarp.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.