A diversity of plants co-exist on rangeland, each serving a function. Plants are classified according to their growth forms. Use a plant where ever possible to illustrate the point. Annuals - plants that come from seed each year such as wheat, corn, cheatgrass. Perennials - plants that regrow each year from the previous years' growth such as Indiangrass, cedar, post oak.
Examples are thistles.
Cool season - plants that complete most of their active growth during the cool time of the year such as Canada wild rye. Warm season - plants that complete most of their growth during the warm months such as big bluestem. Evergreen - plants that retain their green leaves all year such as eastern redcedar. Native - plants that originate in North America. Introduced - plant that originate in other continents.