Empetrum (Crowberry) is a genus of shrub in the family Ericaceae. They are native to Alaska, Saint-Pierre Et Miquelon, South America, The Contiguous United States, Greenland, and Canada.
Definition: This organism produces this material or substance, either during its life or after death. A produces B if some process that occurs in A has output B.
Definition: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
