| Noun | 1. | Leptarrhena - one species: leatherleaf saxifrage rosid dicot genus - a genus of dicotyledonous plants family Saxifragaceae, Saxifragaceae, saxifrage family - a large and diverse family of evergreen or deciduous herbs; widely distributed in northern temperate and cold regions; sometimes includes genera of the family Hydrangeaceae leatherleaf saxifrage, Leptarrhena pyrolifolia - 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 |