The Collaborative International Dictionary of English v.0.48:
Umbellate \Um"bel*late\, Umbellated \Um"bel*la`ted\, a. [NL. umbellatus.] (Bot.) Bearing umbels; pertaining to an umbel; umbel-like; as, umbellate plants or flowers. [1913 Webster]WordNet (r) 3.0 (2006):
umbellate adj 1: bearing or consisting of or resembling umbels [syn: umbellate, umbellar] 2: resembling an umbel in form [syn: umbellate, umbel-like]