Black-eyed Susan, the common name of two different plants. The North American black-eyed Susan, or yellow daisy, has golden-yellow petals with dark-colored central disks. The plant is covered with short, stiff hairs, and reaches a height of three feet (90 cm). It is found in meadows and open places all over the eastern half of North America. Occasionally it is transplanted to gardens. It is the state flower of Maryland.The black-eyed Susan, or yellow daisy, has dark centers and orange-yellow petals.
The African black-eyed Susan is a vine native to the tropics. A single five-lobed flower grows on each stalk. The flowers are usually white, but may also be purple or orange. In northern regions they bloom from July to the first frost. The African black-eyed Susan reaches a height of three to eight feet (90 to 240 cm) on a trellis.
The North American black-eyed Susan is Rud-beckia hirta of the family Compositae. The African plant is Thunbergia alata of the family Acanthaceae.North American Black-eyed Susans