Coleanthus subtilis (Tratt.) Seidel (Poaceae) is a rare grass in the monotypic genus Coleanthus Seidl. It has been protected in many countries, such as the Czech Republic, North America and China, because of the extremely short life cycle, strict habitat and breeding conditions, and habitat destruction. In addition, C. subtilis has a remarkable ability to reappear in its previous habitats after long time intervals.
