WordNet (r) 3.0 (2006):

Leptarrhena pyrolifolia
    n 1: plant with basal leathery elliptic leaves and erect
         leafless flower stalks each bearing a dense roundish
         cluster of tiny white flowers; moist places of northwestern
         North America to Oregon and Idaho [syn: leatherleaf
         saxifrage, Leptarrhena pyrolifolia]