《中国植物志》|| 豆科 LEGUMINOSAE ||紫荆族 Cercideae Bronn ||羊蹄甲属 Bauhinia Linn.

15．羊蹄甲属Bauhinia Linn.
Linn. Sp. Pl. 374. 1753; Taub. in Engl. u Pcantl, Nat. Pflanzenfam. 3 (3): 147. 1892; Hutch. Gen. Fl. Pl. 1: 242. 1964.
乔木，灌木或攀援藤本。托叶常早落；单叶，全缘，先端凹缺或分裂为2裂片，有时深裂达基部而成2片离生的小叶；基出脉3至多条，中脉常伸出于2裂片间形成一小芒尖。花两性，很少为单性，组成总状花序，伞房花序或圆锥花序；苞片和小苞片通常早落；花托短陀螺状或延长为圆筒状；萼杯状，佛焰状或于开花时分裂为5萼片；花瓣5片，略不等，常具瓣柄；能育雄蕊10、5或3枚，有时2或1枚，花药背着，纵裂，很少孔裂；退化雄蕊（或称不育雄蕊）数枚，花药较小，无花粉；假雄蕊先端渐尖，无花药，有时基部合生如掌状；花盘扁平或肉质而肿胀，有时缺；子房通常具柄，有胚珠2至多颗，花柱细长丝状或短而粗，柱头顶生，头状或盾状。荚果长圆形，带状或线形，通常扁平，开裂，稀不裂；种子圆形或卵形，扁平，有或无胚乳，胚根直或近于直。
属模式种：B. divaricata Linn.
约600种，遍布于世界热带地区。我国有40种，4亚种，11变种，主产南部和西南部。

《云南植物志》|| 苏木科 Caesalpiniaceae nom. conserv. ||苏木科 Caesalpiniaceae nom. conserv. ||羊蹄甲属 Bauhinia L.

2.羊蹄甲属 Bauhinia L.
乔木、灌木或攀援藤本，常具卷须。单叶互生，半常绿或落叶，叶片先端凹缺或通常2裂，或全裂为2小叶，稀全缘，基出脉3至多条，中脉常伸出2裂片间成小芒尖；托叶早落。花两性，极稀单性，组成总状花序、伞房花序或圆锥花序；苞片及小苞片常为线形，小，稀大，宿存或早落；花大，美丽，或较小，色泽变异多样；花托短陀螺状，或伸长为圆筒状，花萼杯状，佛焰苞状或匙状，开花时2—5齿裂；花瓣5，近等大，通常有瓣柄（或称爪）；雄蕊10，或退化为3—5，有时仅1—2，花丝分离，线形，花药背着或基着，纵裂或顶孔开裂；雄蕊少于10枚时常具退化雄蕊，花丝较短，花药小，或无花粉或无花药；花盘扁平或肉质而肿胀，有时缺；子房有柄，稀无柄，花柱细长或粗短，柱头各式，盾状或头状，顶生或偏斜；胚珠2至多颗。荚果线形，长圆形或带状，扁平，开裂，稀不开裂；种子近圆形或卵形，扁平，有胚乳或无，胚根直或近于直。2n=24、26、28（42，56）。
过去认为约600种，近期经过整理认为约有250种（狭义的仅100种）（Mabberls 1990）。分布于全世界热带及亚热带地区。我国有40余种，分布长江以南各省区，主产华南及西南。云南有30种，遍及全省。

《Flora of China》|| Fabaceae || ||羊蹄甲属 Bauhinia

2. Bauhinia Linnaeus, Sp. Pl. 1: 374. 1753.

羊蹄甲属 yang ti jia shu

Authors: Dezhao Chen, Prof. Dianxiang Zhang, Kai Larsen & Supee Saksuwan Larsen

Bauhinia sect. Lasiobema Korthals; Lasiobema (Korthals) Miquel; Phanera Loureiro; Piliostigma Hochstetter.

Trees, shrubs, or lianas, hermaphroditic, monoecious, andromonoecious, or androdioecious. Leaves simple, bilobed or entire, rarely 2-foliolate with a shared upper pulvinus; primary veins 3-15, midvein ending with a free, small point; stipules caducous. Inflo­rescences solitary flowers, or many flowers in racemes, panicles, or corymbs; bracts and bracteoles usually small and caducous. Hypanthium cupular, campanulate, or tubular. Calyx closed or open with 5 short or linear teeth at apex in bud, at anthesis spatha­ceous, or regularly or irregularly split into 2-5 lobes. Petals 5, subequal to strongly differentiated, subsessile or prominently clawed, white, yellowish orange, pink, or purplish red. Stamens 2, 3, 5, or 10; anthers dorsifixed, longitudinally dehiscent. Staminodes pres­ent or not. Ovary 1- to many ovuled, sessile or with stalk; stigma small or prominent, variously shaped. Fruit flat, elliptic, oblong, obovoid, or linear, woody or thinly valved, dehiscent or indehiscent. Seeds few to many; endosperm present or not.

About 300 species: pantropical; 47 species (23 endemic, two introduced) in China.

The key is based on flowering material as there are too many species for which the mature legumes are not known. Bauhinia tianlinensis is known only from fruiting material so could not be included in the key. Legumes of China (Zhu et al., 37, 40, 42, 43, 47. 2007) listed a further five species not included in this manuscript: B. clemensiorum Merrill from Guangxi; B. galpinii N. E. Brown cultivated in Hong Kong; B. godefroyi Gagnepain from Yunnan; B. lakhonensis Gagnepain from Guangxi; and B. strychnoidea Prain ex King from Yunnan.