锈毛棋子豆 xiu mao qi zi dou

Pithecellobium balansae Oliver, Hooker’s Icon. Pl. 20: t. 1976. 1891; Albizia balansae (Oliver) Y. H. Huang; Cylindro­kelupha balansae (Oliver) Kostermans.

Trees, 8-25 m tall. Branchlets red-brown, obviously lenti­cellate. Leaf petiole 6-8 cm; glands elliptic, flat; pinnae 2 pairs; leaf rachis 16-24 cm; petiolules 5-8 mm; leaflets 4 pairs, opposite, with 1 gland per leaflet pair, oblong or oblanceolate, (5-)10-18 × 3-6.5 cm, abaxially ferruginous pubescent, more densely so on veins, adaxially glabrous or very sparsely fer­ruginous pubescent, lateral veins 5-7 pairs, conspicuous on both surfaces, base attenuate or obtuse, apex shortly acuminate. Flowers sessile, ca. 20 in globose head, heads arranged in pani­cle ca. 20 cm, ferruginous tomentose, branches sparse. Calyx cup-shaped, ca. 1.5 mm. Corolla tube ca. 2.5 mm; lobes 5, ca. 2 mm. Staminal tube equaling corolla tube; filaments 8-10 mm. Ovary stipitate, glabrous. Legume cylindric, 7-15 × ca. 6 cm. Seeds 2-6, bullet-form at both ends, middle ones shortly cylin­dric, ca. 4.5 cm high and in diam. Fl. Apr-May, fr. Jul.

Thin forests; 600-1300 m. S Yunnan [Vietnam].