Description from Flora of China
Mimosa cyclocarpa Jacquin, Fragm. Bot. 30. 1800.
Trees, unarmed, deciduous, large, 10-20 m tall; crown spreading, thin. Young branchlets, leaves, and inflorescences white pubescent. Stipules caducous, small; petiole and rachis with glands; pinnae (3 or)4-9 pairs; leaflets 12-25(-30) pairs, subsessile, falcate-lanceolate, 8-14 × 3-6 mm, both surfaces sparsely pubescent, midvein close to upper margin, base truncate, apex mucronate. Heads globose, 1-1.5 cm in diam., fasciculate or in racemes. Flowers greenish or white. Calyx ca. 3 mm, calyx and corolla pubescent. Corolla ca. 6 mm. Stamens numerous, basally connate into a tube. Legume black-brown, curved, auriculate-reniform, 5-7 cm in diam., fleshy, both ends rounded, indehiscent. Seeds 10-20, arranged in 2 rows, dark brown, shiny, narrowly ellipsoidal, ca. 1.5 cm, hard. Fl. Apr-Jun, fr. Oct-Dec.
Cultivated in Fujian, Guangdong, Guangxi, Jiangxi, Zhejiang [native to Central and South America; commonly cultivated in tropical areas].