Equisetum (Horsetail) is a genus of herb in the family horsetails. They are native to Alaska, Saint-Pierre Et Miquelon, Greenland, Canada, North America, and The Contiguous United States. They have alternation of generations.
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)
Definition: The institution that holds a type specimen for a given species. The recommended best practice is to use the identifier in a collections registry such as the Biodiversity Collections Index (http://www.biodiversitycollectionsindex.org/).
