Psilotales is an order of plants. There are 19 species of Psilotales, in 2 genera and 1 family. It includes groups like Whisk Ferns. They have alternation of generations.
Definition: plant obtaining organic carbon from a host green plant by tapping into an intermediary mycorrhizal fungus attached to the roots of the host plant
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: The important feature of homospory is the four fold division involved in spore production, this takes the form of either a tetrahedra which gives a trilete (Y shaped scar) spore or a tetragon which gives a monolete (single linear scar) spore.
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)
