四棱猪屎豆Crotalaria tetragona
中文名（Chinese Name）：四棱猪屎豆
学名（Scientific Name）：Crotalaria tetragona Roxb. ex Andr.
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：Crotalaria esquirolii H. Lév. Crotalaria obtecta Graham
科属（Family & Genus）：蝶形花科,Fabaceae猪屎豆属
形态特征（Description）：多年生高大草本，高达2米；茎四棱形，被丝质短柔毛。托叶线形或线状披针形，长4-5毫米；单叶，叶片长圆状线形或线状披针形，长10-20 (-25) 厘米，宽1-2.5厘米，先端渐尖，基部钝或圆，两面被毛，尤以下面毛更密，叶柄短。总状花序顶生或腋生，有花6-10朵；苞片披针形，长4-6毫米，先端渐尖，小苞片线形，长3-4毫米，生花梗中部以上；花梗长1-1.5厘米；花萼二唇形，长1.5-2.5厘米，二唇深裂近达基部，萼齿披针形，弯曲成半月形，先端渐尖；花冠黄色，旗瓣圆形或长圆形，长约2.5厘米，基部具二枚胼胝体，翼瓣长椭圆形或披针状椭圆形，长约2厘米，龙骨瓣与旗瓣等长，具喙，伸出萼外；子房无柄。荚果长圆形，长4-5厘米，密被棕黄色茸毛；种子10-20颗。花果期9月至翌年2月。
分布（Distribution）：产广东、广西、四川、云南。生海拔500-1600米山坡路旁及疏林中。印度、尼泊尔、不丹、缅甸、越南、印度尼西亚也有。
用途（Use）：引自植物志英文版：FOC Vol. 10 Page 107, 111
Crotalaria tetragona Roxburgh ex Andrews, Bot. Repos. 9: t. 593. 1812.
四棱猪屎豆 si leng zhu shi dou | Fabaceae | Crotalaria
Crotalaria esquirolii H. Léveillé.
Herbs, erect, to 2 m tall. Branches 4-angled, silky pubescent. Stipules linear to linear-lanceolate, 4-5 mm. Leaves simple; petiole ca. 4 mm; leaf blade oblong-elliptic to linear-lanceolate, 10-20(-25) × 1-2.5 cm, both surfaces finely appressed pubescent, midvein abaxially pale and prominent, base broadly cuneate to obtuse, apex acute to slightly acuminate. Racemes terminal or leaf-opposed, 6-10-flowered; bracts lanceolate, 4-6 mm. Pedicel 1-1.5 cm; bracteoles inserted at apex of pedicel, linear, 3-4 mm. Calyx 2-lipped, 1.5-2.5 cm, divided to near base, densely brown pilose; abaxial lobes narrowly triangular-lanceolate, connate for ca. 1/4 of length, 4-5 mm wide at base; adaxial lobes similar, divided to near base. Corolla yellow; standard suborbicular to oblong, ca. 2.5 cm, base with 2 appendages; wings narrowly elliptic to lanceolate-elliptic, ca. 2 cm; keel ± as long as wings, broad and rounded, abaxial margin woolly, beak long, twisted, and exserted beyond calyx. Legume oblong, 4-5 cm, 10-20-seeded, [dark brown tomentose or] densely brownish yellow pubescent. Fl. Sep-Nov, fr. Dec-Feb.
Sparse forests, along trails; 500-1600 m. Guangdong, Guangxi, Sichuan, Yunnan [Bangladesh, Bhutan, India, Laos, Myanmar, Nepal, ?Philippines, Thailand, Vietnam].
（责任编辑：徐晔春）
学名（Scientific Name）：Crotalaria tetragona Roxb. ex Andr.
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：Crotalaria esquirolii H. Lév. Crotalaria obtecta Graham
科属（Family & Genus）：蝶形花科,Fabaceae猪屎豆属
形态特征（Description）：多年生高大草本，高达2米；茎四棱形，被丝质短柔毛。托叶线形或线状披针形，长4-5毫米；单叶，叶片长圆状线形或线状披针形，长10-20 (-25) 厘米，宽1-2.5厘米，先端渐尖，基部钝或圆，两面被毛，尤以下面毛更密，叶柄短。总状花序顶生或腋生，有花6-10朵；苞片披针形，长4-6毫米，先端渐尖，小苞片线形，长3-4毫米，生花梗中部以上；花梗长1-1.5厘米；花萼二唇形，长1.5-2.5厘米，二唇深裂近达基部，萼齿披针形，弯曲成半月形，先端渐尖；花冠黄色，旗瓣圆形或长圆形，长约2.5厘米，基部具二枚胼胝体，翼瓣长椭圆形或披针状椭圆形，长约2厘米，龙骨瓣与旗瓣等长，具喙，伸出萼外；子房无柄。荚果长圆形，长4-5厘米，密被棕黄色茸毛；种子10-20颗。花果期9月至翌年2月。
分布（Distribution）：产广东、广西、四川、云南。生海拔500-1600米山坡路旁及疏林中。印度、尼泊尔、不丹、缅甸、越南、印度尼西亚也有。
用途（Use）：引自植物志英文版：FOC Vol. 10 Page 107, 111
Crotalaria tetragona Roxburgh ex Andrews, Bot. Repos. 9: t. 593. 1812.
四棱猪屎豆 si leng zhu shi dou | Fabaceae | Crotalaria
Crotalaria esquirolii H. Léveillé.
Herbs, erect, to 2 m tall. Branches 4-angled, silky pubescent. Stipules linear to linear-lanceolate, 4-5 mm. Leaves simple; petiole ca. 4 mm; leaf blade oblong-elliptic to linear-lanceolate, 10-20(-25) × 1-2.5 cm, both surfaces finely appressed pubescent, midvein abaxially pale and prominent, base broadly cuneate to obtuse, apex acute to slightly acuminate. Racemes terminal or leaf-opposed, 6-10-flowered; bracts lanceolate, 4-6 mm. Pedicel 1-1.5 cm; bracteoles inserted at apex of pedicel, linear, 3-4 mm. Calyx 2-lipped, 1.5-2.5 cm, divided to near base, densely brown pilose; abaxial lobes narrowly triangular-lanceolate, connate for ca. 1/4 of length, 4-5 mm wide at base; adaxial lobes similar, divided to near base. Corolla yellow; standard suborbicular to oblong, ca. 2.5 cm, base with 2 appendages; wings narrowly elliptic to lanceolate-elliptic, ca. 2 cm; keel ± as long as wings, broad and rounded, abaxial margin woolly, beak long, twisted, and exserted beyond calyx. Legume oblong, 4-5 cm, 10-20-seeded, [dark brown tomentose or] densely brownish yellow pubescent. Fl. Sep-Nov, fr. Dec-Feb.
Sparse forests, along trails; 500-1600 m. Guangdong, Guangxi, Sichuan, Yunnan [Bangladesh, Bhutan, India, Laos, Myanmar, Nepal, ?Philippines, Thailand, Vietnam].
（责任编辑：徐晔春）
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