罗汉参为国家稀有珍贵作物,也是单县名贵特产,是多年蔓生草本豆科作物,多作一年生栽培,其茎蔓细软,主茎长2米以上,有少数侧枝,结有球状块根,直径3～4厘米,单重10～60克,最重可达200克。外表皮土黄色,上有断续的球形花纹,削去外皮,内部肉质洁白 Lohan as a national rare and precious crops, but also a single county expensive specialty, is a perennial leguminous crops for many years, and more for annual cultivation, the stem is thin and soft, the main stem length of 2 meters or more, a few side branches, knot with spherical roots, diameter 3 ~ 4 cm, single weight 10 ~ 60 grams, the most up to 200 grams. The outer surface of the yellow earth, there are intermittent spherical pattern, cut off the skin, internal succulent white