The Umbelliferae is a family of mostly herbaceous hardy plants which generally have flowers in regular compound umbels of small flowers with five petals and fistula furrowed stems. The fruit is composed of two dry, ridged carpels, often traversed by canals filled with pungent oils, and adherent to a central stalk,. They have jointed stems, the leng... Found on http://www.probertencyclopaedia.com/browse/BU.HTM