Source : Webster's Revised Unabridged Dictionary (1913)

Acaulescent \Ac`au*les"cent\, a. [Pref. a- not + caulescent.]
   (Bot.)
   Having no stem or caulis, or only a very short one concealed
   in the ground. --Gray.

Source : WordNet®

acaulescent
     adj : having no apparent stem above ground [syn: {stemless}] [ant:
            {caulescent}]