stemless

from WordNet (r) 3.0 (2006)

stemless
    adj 1: not having a stem; "stemless glassware" [ant: {stemmed}]
    2: (of plants) having no apparent stem above ground [syn:
       {acaulescent}, {stemless}] [ant: {caulescent}, {cauline},
       {stemmed}]

from The Collaborative International Dictionary of English v.0.48

Stemless \Stem"less\, a.
   Having no stem; (Bot.) acaulescent.
   [1913 Webster]