红豆草(Onobrychisviciaefolia Scop)为豆科优良牧草,也是夏季的主要蜜源植物,近年来在我国栽培面积不断扩大,是大有发展前途的蜜源植物。一、形态特征:多年生草本植物,根系发达,主根明显。茎秆直立,粗壮,中空,高70～100厘米以上。叶为奇数羽状复叶,由13～19片小叶组成,小叶长椭圆形,无毛。长总状花序,花红色,鲜艳,荚果扁平。二、分布地区及生态环境:原产于欧洲,温带 Onobrychis viciaefolia Scop is an excellent pasture for leguminous plants and is also the main nectar source in summer. In recent years, its cultivation area in China has been continuously expanding. It is a promising honey plant. First, the morphological characteristics: perennial herbs, roots developed, the main root significantly. Stems erect, stout, hollow, high 70 to 100 cm above. Leaves are odd pinnate, composed of 13 to 19 leaflets, leaflets oblong, glabrous. Long racemes, flowers red, bright, flat pods. Second, the distribution of regional and ecological environment: native to Europe, temperate