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刀豆属于豆科,因豆荚形似刀而得名“刀豆”。又因荚形似人挟剑横斜,故又名“挟剑豆”。主的要品种有蔓性、矮性两种。蔓性刀豆,亦称“大刀豆”、“中国刀豆”、“关刀豆”、“马刀豆”、“刀鞘豆”、“刀巴豆”。一年生草本,茎蔓生。复叶,小叶3片。自叶腋抽生花轴,其上开较大的蝶形花数朵,花紫红色。结大而扁的荚果,长25～30厘米,宽约3.5厘米。种子大有10～14粒,肾脏形,红色或褐色。原产东半球热带地区。矮性刀豆,亦称“矮刀豆”、“立刀豆”、“洋刀豆”。茎矮生或半蔓生,花紫色,荚果较蔓性刀豆小,种子白色,原产印
Cod beans belong to legumes, because pods shaped knife named “knife beans.” Because pod-like people rely on Jian Wang oblique, it is also known as “relying on sword beans.” The main variety to have traits, dwarf two. Gram-shaped beans, also known as “big beans”, “Chinese sword beans”, “off knife beans”, “saber bean”, “scabbard beans”, “knife Croton.” Annual herb, stem vine. Compound leaves, leaflets 3. Since the leaf axils pumping flowers axis, which opened a large number of butterfly flowers, flowers purple. Knot large and flat pods, length 25 ~ 30 cm, width of 3.5 cm. 10 to 14 seeds, kidney shape, red or brown. Origin of the tropical hemisphere region. Dwarf beans, also known as “dwarf beans”, “vertical knife beans”, “mandarin beans.” Stems dwarf or semi-poplar, purple flowers, pods smaller than the worm-dried beans, white seeds, origin India