Rudbeckia

The genus Rudbeckia comprises about 25 species of North American plants, including annuals, biennials, and perennials. These plants are characterized by their showy flower heads, which typically feature yellow ray flowers and a prominent, usually conical, central disk that is brown or black. Common examples grown in gardens include black-eyed Susan (R. hirta), thimble-flower (R. bicolor), and R. laciniata. Black-eyed Susans, in particular, are known for their rough, hairy stems and large leaves, with composite flower heads blooming in late summer and early autumn. These plants are attractive to birds and butterflies and can be used in bouquets.123