Semecarpus

Family Anacardiaceae. Order Sapindales.

Large trees to shrubs. Buttresses absent. Spines present, or absent (Semecarpus bunburyanus). Stilt roots absent. Bark orange, red, gray; not peeling in strips. Slash yellow, brown. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate present; colorless; spotty; blackening on exposure to air. Terminal buds not enclosed by leaves.

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

Leaves spiral, or two-ranked; not scale-like; simple; all of the same type; not modified into spines; coriaceous, or leathery; not gland-dotted; symmetric at the base; not dissected; smooth margined. Epidermis not waxy. Venation pinnate. Secondary veins open; prominent. Smallest veins prominent; net like, or ladder like. Intramarginal vein present, or absent. Stalk of blade less than a quarter the length of the blade to a quarter to one half the length of the blade; not winged; attached to base of leaf blade; not swollen, or swollen; swollen at one end. Stipules absent. Domatia absent. Basal glands absent. Hairs on mature leaf present; dense, or sparse.

Inflorescences present; terminal, or axillary, or on the trunk or branches; 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 different plants; stalked; with the parts barely visible to the eye, or 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-)5; partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; (4-)5; free; not fleshy; deciduous; not stalked; entire. Stamens (4-)5; filaments present; free of each other; free of the perianth; all equal in size; isomerous; opposite the sepals (when isomerous). Anthers 2 loculed; attached along the side; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 3. Locules 1. Styles solitary. Stigmas 3 lobed; distinctive; head shaped. Fruit drupaceous; fleshy; not multiple; not splitting; enclosed in, or sitting on, the fleshy perianth; wingless. Seeds 1 per fruit; less than 5 mm, or about 1 cm long; wingless; uniform in cross-section; aril absent; non-endospermic.

Leaves often papillose on the undersurface with reticulations very prominent below; styles 3; drupes laterally compressed on fleshy calyx. Taxon images: gensemec.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.