1.特性: 紫花苜蓿为豆科苜蓿属多年生草本植物。根系发达,多分枝。主根呈园锥形,入土深。当年栽培的紫花苜蓿根长可达一米以上。茎直立或稍斜上,略呈方形,为深绿色。株高一米以上。叶为三小叶构成的复叶,小叶为倒卵形或长椭园形,尖端呈齿状,后半部为全缘。花为腋生总状花序,蝶形花冠,紫色或稍兰色。异花授粉。荚果螺旋形,内含种子五至八粒。种子甚小,肾脏形,深褐色或淡黄色。 1. Characteristics: Alfalfa Medicago is a perennial herbaceous plant. Roots developed, multi-branched. The main root was park conical, deep into the soil. Current year cultivation of alfalfa root length up to one meter or more. Stem erect or slightly oblique, slightly square, dark green. Plant height of more than one meter. Leaves for the three leaflets constitute the compound leaves, leaflets obovate or oblong-shaped, pointed tip was serrated, the latter part of the entire margin. Flowers axillary racemes, butterfly corolla, purple or slightly blue. Cross-pollination. Pods spiral, containing seeds five to eight. Seeds are very small, kidney-shaped, dark brown or yellowish.