1. Alfalfa, also known as clover, grass head, alfalfa, is a legume, alfalfa plants. Perennial herb, multi-branched, 30-100 centimeters high. Leaves 3-foliolate; leaflets obovate or oblanceolate, 1-2 cm long, ca. 0.5 cm wide, apex rounded, midribs slightly prominent, upper leaf margins serrate, both surfaces white villous; petiolules ca. 1 mm long, hairy; stipules lanceolate, apex pointed, pilose, ca. 5 mm long. Racemes axillary; calyx pilose, calyx teeth narrowly lanceolate, acute; corolla purple, longer than calyx. Pods spiral, sparsely hairy, beaked at apex, with several seeds; seeds reniform, yellow-brown.

2. Native to Turkey, Armenia, Iran, Azerbaijan and other places. Widely cultivated in Eurasia and all over the world. Cultivated or semi-wild throughout China. Born in fields, roadsides, open fields, grasslands, riverbanks and ravines.

3. Alfalfa has medicinal value, containing a variety of active ingredients, can reduce cholesterol and blood lipid content, abatement of atherosclerotic plaque, section of the immune system, antioxidant, anti-aging function; can also be made of pasture. At the same time, also has food value and ecological value, regeneration capacity, is really an excellent soil and water conservation plants in mountainous areas.