Perennial suffrutex 1-2 m, branching only at base, summer-deciduous; root tuberous. Leaves mostly radical, 2-or 3-pinnate, minutely pilose, lower with broad lobes, upper narrower. Flowers in compound umbels on slender peduncles, yellow. Fruit obovoid, somewhat compressed laterally, smooth, vittae present, rib oil ducts inconspicuous.