大叶合欢 da ye he huan

Pithecellobium turgidum Merrill, Philipp. J. Sci. 15: 239. 1919; Albizia croizatiana F. P. Metcalf; A. turgida (Merrill) Merrill; Cylindrokelupha turgida (Merrill) T. L. Wu; Paralbiz­zia turgida (Merrill) Kostermans.

Trees, small, 4-9 m tall. Branches terete. Young branchlets and leaf rachis ferruginous tomentose. Leaf glands near tip of petiole and on rachis at places of leaflet insertion; pinnae 1 pair; petiolules 2-6 mm; leaflets opposite, 2 or 3 pairs, oblong, ellip­tic, obliquely lanceolate, or obliquely elliptic, 7-20 × 3.5-7 cm, papery, abaxially very sparsely appressed pubescent, more densely so on veins, adaxially glabrous, midvein central, lateral veins 6-11 pairs, base acute or rounded, apex long or shortly acuminate. Heads ca. 1.5 cm in diam., ca. 20-flowered, arranged in axillary or terminal panicles. Flowers white. Calyx cup-shaped, ca. 2 mm, 5-toothed. Corolla ca. 6 mm; lobes oblong, corolla and calyx white tomentose. Staminal tube much shorter than corolla tube. Ovary glabrous, sessile or nearly so. Legume swollen, oblong to strap-shaped, 7-20 × 2.5-3.5 cm. Seeds brown, ellipsoidal, 1.8-2.5 × ca. 2 cm, glabrous. Fl. Mar-May, fr. Jul-Dec.

Forests; 1000-1500 m. Guangdong, Guangxi [N Vietnam].