《中国植物志》|| 豆科 LEGUMINOSAE ||菜豆亚族 Subtrib. Phaseolinae Benth. ||四棱豆属 Psophocarpus Neck. ex DC.

66. 四棱豆属 Psophocarpus Neck. ex DC.
Neck. ex DC. Prodr. 2: 403. 1825. (nom. cons.); Benth. et Hook. f. Gen. Pl. 1: 540. 1865; Taub. in Engl. u. Prantl, Nat. Pflanzenfam. 3(3): 384. 1894; Hutch. Gen. Fl. Pl. 1: 442. 1964; Verdc. & P. Haliday in Kew Bull. 33:191. 1978.
草本或亚灌木，通常攀援或平卧，少有直立。具块根。叶为单小叶或为具3小叶的羽状复叶；托叶在着生点以下延长，小托叶存在。花单生或排成总状花序，腋生，花序轴上小花梗着生处肿胀；萼5裂，上方一对裂片完整或2裂；花冠蓝色或微紫，伸出萼外，旗瓣近圆形，基部具耳及附属体，无毛，冀瓣斜倒卵形，龙骨瓣弯成直角；对旗瓣的1枚雄蕊分离或连合至中部，花药中5个背着的与5个基着的互生；子房具3-21颗胚珠，有翅。花柱弯曲，具纵列的髯毛或柱头下具一圈毛，柱头顶生或内向，画笔状。荚果长圆形，沿棱角具明显或不太明显的4翅，开裂，种子间多少具隔膜；种子卵形或长圆状椭圆形，有或无假种皮。
属模式种：四棱豆 Psophocarpus tetragonolobus (Linn.) DC.
9种，产东半球热带地区。我国云南、广西、广东和台湾栽培有1种。

《云南植物志》|| 蝶形花科 Papilionaceae ||菜豆族 Trib. Phaseoleae DC. ||四棱豆属 Psophocarpus Neck. ex DC.

57. 四棱豆属 Psophocarpus Neck. ex DC.
草质或亚灌木状缠绕植物，通常攀缘或平卧，有块根。叶为单小叶或为具3小叶的羽状复叶；托叶膜质，盾状着生，具小托叶。花稍大，单生或数朵排成腋生的总状花序，簇生于近顶部；苞片小，极早落，萼5裂，上方1对裂片完整或2裂；花冠浅蓝色或淡紫色，伸出萼外，旗瓣近圆形，基部具耳及附属体，无毛，翼瓣斜倒卵形，龙骨瓣弯成直角；对旗瓣的1枚雄蕊离生或分离至中部，花药中5个背着的与5个基着的互生；子房具短柄，胚珠多颗，有翅。花柱粗，内弯，具纵列的髯毛或柱头下具一圈毛，柱头顶生或内向，画笔状。荚果四棱柱状，沿棱角具较明显的4翅，开裂，种子间多少具隔膜；种子球形或长椭圆形，种脐侧生。
9种，产东半球热带地区。我国栽培1种，云南也有。

《Flora of China》|| Fabaceae || ||四棱豆属 Psophocarpus

98. Psophocarpus Necker ex Candolle, Prodr. 2: 403. 1825.

四棱豆属 si leng dou shu

Authors: Delin Wu & Mats Thulin

Botor Adanson.

Herbs, climbing or prostrate, rarely erect, with tubers. Leaves pinnately 3-foliolate; stipules produced below point of insertion; leaflets stipellate. Flowers solitary or in axillary racemes with swollen nodes. Bracts small, very caducous; bracteoles larger, mem­branous, persistent for a time. Calyx 5-toothed, 2 upper teeth connate into entire or bifid lip. Corolla lilac or violet, exserted from calyx; standard suborbicular, appendaged with basal auricles; wings obliquely obovate; keel incurved at apex, obtuse. Vexillary sta­men free at base, connate with tube in middle; anthers uniform, 5 basifixed alternating with 5 dorsifixed. Ovary shortly stipitate; ovules 3-21; style incurved; stigma globose, densely penicillate-villous. Legumes oblong, 4-winged lengthwise, septate between seeds. Seeds ovate or oblong-elliptic, with or without aril.

About 10 species: distributed in tropical regions of the Old World; one species (introduced) in China.