白花合欢 bai hua he huan

Albizia lancangensis Y. Y. Qian; A. laotica Gagnepain; A. yunnanensis T. L. Wu.

Trees, 8-10 m tall. Branchlets ferruginous pubescent, lenticellate. Stipules inconspicuous; leaf glands elliptic, near base of petiole and near apex of rachis; pinnae 2-4 pairs; petiolules ca. 2 mm; leaflets 4-6 pairs, elliptic, ovate, or obo­vate, 2-7 × 1.5-4 cm, abaxially pubescent, adaxially glabrous, main vein central, slightly asymmetric, base obliquely truncate, apex rounded-obtuse. Heads 7-10-flowered, arranged in pani­cles; peduncles 2.5-3.5 cm, densely pubescent. Flowers dimor­phic, sessile, white. Calyx cup-shaped, ca. 1 mm, 5-dentate, ca­lyx and corolla yellowish or white tomentose. Corolla tube ca. 3.5 mm; lobes deltoid-ovate, ca. 2.5 mm. Stamens ca. 25; fila­ments ca. 2.5 cm, basally connate into a tube. Ovary glabrous, stipe ca. 1 mm. Legume dehiscent, red-brown, ligulate, 15-22 × ca. 3.5 cm, thin, glabrous. Seeds 8-11, brown, elliptic, ca. 9 × 6 mm; pleurogram narrowly elliptic. Fl. Aug, fr. Nov.

Forests; 500-1300 m. Guangxi, Yunnan [Laos, Myanmar, Thai­land, Vietnam].