Coneflower is a flowering plant in family Asteraceae, a member of genusRudbeckia. The disk flowers show a cone-like form that often persists after the ray flowers are lost. These annual or perennial plants are also called Gloriosa daisies or Black-eyed susans. Some species have been developed into popular cultivars. The genus is native to North America and has about six species (the actual number is controversial). Many other species assigned to this genus are often cultivars. Other plants called coneflower belong to other genera.
Some Rudbeckia species:
R. fulgida - Orange coneflower, Black-eyed susan
R. hirta - Black-eyed susan, Gloriosa daisy, Yellow ox-eye daisy.
The herb echinacea, derived from the purple coneflower, is taken for colds and other ailments; the plant was used medicinally by Native Americans.
Other coneflowers include the yellow coneflowers, or rudbeckias (see fl-eyed Susan), and the praire coneflowers (genus Ratibida), which have yellow or purplish rays.
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