You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Elymus and Nicandra, are types of what?" whose answer is plants.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Elymus and Nicandra
Useful Output:

Doc 1: All species of Elymus are alloploids that combine one copy of the St haplome present in Pseudoroegneria with at least one other haplome.
Doc 2: Elymus species used for food by humans warrant pre-breeding and future analyses to assess potential utility in perennial agricultural systems.
Doc 3: Plants of Elytrigia repens with awns are quite common and tend to be recorded as. Elymus caninus by the unwary (when the florets of the latter drop or are
Doc 4: Search results. Species. Elymus spicatus (Pursh) Gould. Synonym of: Pseudoroegneria spicata (Pursh) Á.Löve · Species. Pseudoroegneria spicata (Pursh) Á.Löve. A
Doc 5: Nicandra physalodes Scop. United States of America. Oct 3, 1909. Euphorbia cyparissias L. United States of America. May 28, 1894. Potamogeton amplifolius Tuck