Azadirachta

Family Meliaceae. Order Sapindales.

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

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

Leaves spiral; not scale-like; compound; pinnate; without a terminal leaflet, or with a terminal leaflet; leaflets opposite; all of the same type; not modified into spines; coriaceous; not gland-dotted; very asymmetric at the base; not dissected; smooth margined, or with small to large teeth on margin. Epidermis not waxy. Venation pinnate. Secondary veins open; not prominent, but visible. Smallest veins not prominent, but visible; net like. Intramarginal vein 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 present (2 pairs of glands at base of petiole). Hairs on mature leaf absent.

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; 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 5; 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 10; filaments present; joined (forming a tube); free of the perianth; all equal in size; diplostemonous. Anthers 2 loculed; attached along the side, or attached by the base; not awned; dehiscing by long slits. Ovary superior. Carpels joined; 3. Locules 3. Styles solitary. Stigmas 3 lobed; not distinctive. Fruit drupaceous; fleshy; not multiple; not splitting; not enclosed in, or sitting on, fleshy perianth parts; wingless. Seeds 1(-2) per fruit; less than 5 mm; wingless; uniform in cross-section; aril present (small adaxial sarcotesta present); non-endospermic.

2 pairs of glands usually present at base of petiole; style 3-lobed; fruit a 1-2 seeded drupe. Taxon images: azadir.gif azadir2.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.