Durio

Family Bombacaceae. Order Malvales.

Large trees to small trees. Buttresses present, or absent; short. Spines absent. Stilt roots absent. Bark red, gray, brown; not peeling in strips. Slash orange, red, gray, brown. Vertical stripes in the inner bark or wood absent. Odor absent. Exudate absent. Terminal buds not enclosed by leaves.

Complex hairs present; disk-shaped, or 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; 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 prominent, or not prominent, but visible, or not 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, or 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 absent. Hairs on mature leaf present; dense.

Inflorescences present; axillary, or on the trunk or branches; the flowers from a single point on the stem, or on an unbranched axis, or on a branched axis; specialized inflorescence units absent; numerous and persistent inflorescence bracts absent. Flowers bisexual; stalked; about 0.5 cm long or across, or 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 (4-)5(-6); partially joined; not persistent in fruit; not growing any further after flowering. Epicalyx present. Petals present; (4-)5(-6); free; not fleshy; deciduous; not stalked; entire. Stamens 100 (many); filaments present; joined, or free of each other; free of the perianth; all equal in size; polystemonous. Anthers 1 loculed; attached by the base; not awned; dehiscing by pores, or dehiscing by long slits. Ovary superior. Carpels joined; (3-)5(-6). Locules (3-)5(-6). Styles solitary. Stigmas 1 lobed; not distinctive. Fruit capsular; fleshy; not multiple; splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 100 per fruit (many); less than 5 mm, or about 1 cm long, or much more than 1 cm long; wingless; uniform in cross-section; aril present; non-endospermic.

Buttresses small or absent; parts covered in dense frilled peltate scales and/ or stellate hairs; epicalyx encloses bud; petals longer than sepals; anthers unilocular; fruit splitting before or after falling; aril thick. Taxon images: durio.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.