1) Myosurus minimus 
The word mousetail is used as a common name for species of plants in either of two genera: ...
• (n.) A genus of ranunculaceous plants (Myosurus), in which the prolonged receptacle is covered with imbricating achenes, and so resembles the tail of a mouse.
any of about 15 species of small, annual, herbaceous (nonwoody) plants constituting the genus Myosurus of the buttercup family (Ranunculaceae). They ...
Mouse'tail` noun (Botany) A genus of ranunculaceous plants ( Myosurus ), in which the prolonged receptacle is covered with imbricating achenes, and so resembles the tail of a mouse.