Disepalum

Family Annonaceae. Order Magnoliales.

Small trees to shrubs. Buttresses absent. Spines absent. Stilt roots absent. Bark gray, black; peeling in strips. Exudate absent. Terminal buds not enclosed by leaves.

Complex hairs absent. Stinging hairs absent. Mature twig indumentum absent.

Leaves two-ranked; not scale-like; simple; 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; not prominent, but visible. Smallest veins not prominent, but visible, or not 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 (in pairs), or represented by solitary flowers only; terminal; the flowers from a single point on the stem; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; stalked; about 0.5 cm long or across to to about 3 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 2-3; free, or partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx absent. Petals present; 4-9; all joined (base); fleshy; deciduous; not stalked; entire. Stamens 100 (many); filaments absent; free of the perianth; all equal in size; polystemonous. Anthers 2 loculed; not awned; dehiscing by short slits. Ovary superior. Carpels separate; 100 (many). Locules 1. Styles solitary. Stigmas 1 lobed; not distinctive. Fruit berry-like; fleshy to non-fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1-2 per fruit; less than 5 mm to about 1 cm long; wingless; with folds like marble, in cross- section; aril absent; endospermic.

Sepals often two, petals 4; ovary and stigmas four angled. Taxon images: disep.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.