Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

umbellate
     adj 1: bearing or consisting of or resembling umbels [syn: {umbellar}]
     2: resembling an umbel in form [syn: {umbel-like}]