“沙打旺”是一种多年生豆科灌木。基部分生枝干,枝干由下而上每隔一至三寸互生分枝,分枝上生长数片到十数片羽状复叶。每年秋季在分枝的叶腋抽出花(?),开花结果。花为总状花序,种子扁形,黑棕色,比白菜籽略小。根有主根和侧根,根上有根瘤。 “Asthma sand” is a perennial mesquite shrub. Basal stems branches, stems from bottom to top every other to three inches alternate branches, branches on the number of tablets to dozens of pinnate compound leaves. Flowers (?) Are drawn in the axillary branches of the branches every autumn, flowering. Flowers raceme, seeds flat, dark brown, slightly smaller than the cabbage. Roots and lateral roots, root nodules.