Isoberlinia

Unarmed trees. Leaves paripinnate; stipules intrapetiolar, connate, or free in their upper part; leaflets opposite or subopposite, in 2-5 pairs, petiolulate, +/- unequal-sided at base, without translucent gland dots. Inflorescence normally paniculate; branches racemose or paniculate; bracteoles 2, well-developed, valvate, completely enclosing flower buds, persistent. Hypanthium tubular, 2.5-8 mm long. Sepals (4)5(-7), subequal. Petals 5(6); usually all well-developed, but upper one always somewhat longer or wider than others and often of a different shape. Stamens 10(-14); filaments free, exserted. Ovary sessile to shortly stipitate, and arising on tube of hypanthium; ovules 4-8. Pod dehiscing elastically or explosively into 2 flattened smooth or sometimes obliquely-nerved woody valves; upper suture not at all winged. Seeds compressed, +/- obovate-elliptic, with thin testa and short funicle.