Dictionary.net

• dwarf prostrate mat-forming shrub of arctic and alpine regions of North America and Greenland having deep green elliptic leaves that taper toward the base

2006 - WordNet 3.0
By Princeton University

• dwarf prostrate mat-forming shrub of arctic and alpine regions of North America and Greenland having deep green elliptic leaves that taper toward the base

2011 - English Dictionary Database
By DataStellar Co., Ltd