牛蹄豆Pithecellobium dulce (Roxb.) Benth.

别名：monkeypod;甜肉围诞树;洋皂荚;金龟树;洋酸角;甜肉围涎树;牛蹄豆属;

科名：豆科 Leguminosae

属名：猴耳环属 Pithecellobium

《中国植物志》第39卷052页
  1．牛蹄豆（海南）
  Pithecellobium dulce (Roxb.) Benth. in London Journ. Bot. 3: 199. 1844; Baker in Hook. f. Fl. Brit. Ind. 2: 302. 1878; 陈焕镛等, 海南植物志2: 205. 1965;中国高等植物图鉴2: 321. 1972. ——Mimosa duclis Roxb. Pl. Corom. 1: 67. pl. 99. 1798.
  常绿乔木，中等大；枝条通常下垂，小枝有由托叶变成的针状刺。羽片1对，每一羽片只有小叶1对，羽片和小叶着生处各有凸起的腺体1枚；羽片柄及总叶柄均被柔毛；小叶坚纸质，长倒卵形或椭圆形，长2-5厘米，宽2-25毫米，大小差异甚大，先端钝或凹入，基部略偏斜，无毛；叶脉明显，中脉偏于内侧。头状花序小，于叶腋或枝顶排列成狭圆锥花序式；花萼漏斗状，长1毫米，密被长柔毛；花冠白色或淡黄，长约3毫米，密被长柔毛，中部以下合生；花丝长8-10毫米。荚果线形，长10-13厘米，宽约1厘米，膨胀，旋卷，暗红色；种子黑色，包于白色或粉红色的肉质假种皮内。花期3月；果期7月。
  我国台湾、广东、广西、云南有栽培。原产中美洲，现广布于热带干旱地区。
  木材可为箱板和一般建筑用材；树皮含单宁30%；荚果可作饲料；假种皮在墨西哥用来制柠檬水。

《Flora of China》 Vol. 10 (2010)
Pithecellobium dulce  (Roxburgh) Bentham London J. Bot. 3: 213. 1844.
牛蹄豆   niu ti dou
Mimosa dulcis Roxburgh, Pl. Coromandel 1: 67. 1798.
Trees, evergreen. Branches often pendulous; branchlets armed with spinescent stipules. Pinnae 1 pair; glands at junction of pinnae and leaflets; leaflets sessile, 1 pair per pinna, elliptic or obovate-elliptic, 2-5 × 0.2-2.5 cm, both surfaces glabrous, reticulate veins raised abaxially, base slightly oblique, apex obtuse or emarginate. Inflorescence pedunculate heads, aggre-gated in terminal panicles. Calyx funnel-shaped, 1-1.5 mm, to-mentose. Corolla ca. 6 mm. Stamens numerous, connate into a tube at base. Legume blackish brown, curved into a circle, flat, 5-7 cm in diam. Seeds dark brown, shiny, ovoid-ellipsoid, ca. 1.5 cm, hard, with pleurogram. Fl. Mar-Jun, fr. Jul. 2n = 26.
Cultivated in Fujian, Guangdong, Guangxi, Hainan, Jiangxi, Tai-wan, Yunnan, Zhejiang [native to tropical regions of C and N South America; cultivated throughout the tropics].
The timber is used for general construction and the bark for its tannins.The timber is used for general construction and the bark for its tannins.