Sericocarpus is a genus of North American plants in the tribe Astereae within the family Asteraceae. Whitetop aster is a common name for the genus.
Symphyotrichum depauperatum, commonly known as serpentine aster or starved aster, is a rare species in the family Asteraceae adapted to serpentine barrens, an ecosystem with a high concentration of toxic metals in the soil. It has been found in Pennsylvania, Maryland, and on some diabase glades in North Carolina. It grows to 50 centimeters and has white ray florets surrounding a center of yellow disk florets.
Symphyotrichum oblongifolium, commonly known as aromatic aster or oblong-leaved aster, is a species of flowering plant in the family Asteraceae and is native to parts of the eastern and central United States. It is an uncommon herbaceous perennial that reaches heights of 10–80 centimeters and blooms August–November with many flower heads in various shades of purple.
Sericocarpus rigidus is a species of flowering plant in the family Asteraceae known by the common name Columbian whitetop aster. It is native to the Pacific Northwest of North America, where it is known from southern Vancouver Island in British Columbia south along the coast to Washington and Oregon.
Phacelia dubia is an annual forb native to the eastern United States, that produces cream colored or light blue flowers in early spring.
Doellingeria infirma, the cornel-leaf whitetop or cornel-leaved aster, is a perennial forb native to the eastern United States, that produces white composite flowers in late summer.
Cardamine angustata is a perennial forb native to the eastern United States, that produces white to pink or purple flowers in early spring.
Cardamine douglassii, the limestone bittercress or purple cress, is a perennial forb native to the eastern and central United States as well as the province of Ontario in Canada, that produces white to pink or purple flowers in early spring.
Antennaria plantaginifolia is a perennial forb native to the eastern North America, that produces cream colored composite flowers in spring.
Chaerophyllum procumbens, known by the common names spreading chervil and wild chervil, is an annual forb native to the eastern United States and Canada, which produces small white flowers in spring.
Uvularia perfoliata, the perfoliate bellwort, is a perennial forb native to the eastern United States and Canada, which produces pale yellow flowers in spring.
Aureolaria virginica, the downy yellow false foxglove or downy oak leach, is a perennial forb native to the eastern United States and Canada, which produces yellow flowers in summer.
Agalinis purpurea is an annual forb native to the eastern United States and Canada, which produces purple flowers in late summer or early fall.
Agalinis tenuifolia, known by the common names common gerardia, slender false foxglove or common false foxglove, is an annual forb native to the eastern and southwestern United States, and Canada, which produces purple flowers in late summer or early fall.
Clitoria mariana, known by the common names butterfly pea and Atlantic pigeon wings, is a perennial herbaceous plant in the pea family, Fabaceae. The plant is native to the United States.
Sida hermaphrodita, known by the common names Virginia fanpetals and Virginia mallow, is a perennial forb native to the eastern United States, which produces white flowers in summer.
Helianthus decapetalus, known by the common names thinleaf sunflower and thin-leaved sunflower, is a perennial forb in the family Asteraceae. It is native to the Eastern and Central United States and Canada, from New Brunswick west to Iowa, Wisconsin, and Ontario, south as far as Georgia and Louisiana. It produces yellow composite flowers in late summer or early fall.
Penthorum sedoides, known by the common name ditch stonecrop, is a perennial forb native to the eastern United States and Canada which produces small white flowers in summer.
Doellingeria umbellata, known by the common names tall flat-topped white aster, parasol whitetop, or tall white-aster, is a North American plant species in the family Asteraceae. It is native to Canada, St. Pierre and Miquelon, and the eastern and north-central United States (from Nebraska and the Dakotas east to Maine and South to Mississippi, Georgia and the Florida Panhandle.
Symphyotrichum retroflexum is a species of flowering plant in the family Asteraceae native to the southeastern United States. Commonly known as rigid whitetop aster, it is a perennial, herbaceous plant that may reach 40 to 100 centimeters tall. Its flowers have blue to purple ray florets and cream to pale yellow then pinkish disk florets. It is known only from the Blue Ridge Mountains in Alabama, Georgia, North Carolina, South Carolina, Tennessee, and Virginia, where it grows in wooded areas at elevations of 400–1,500 meters. As of September 2021, NatureServe classified it as Apparently Secure (G4); it had been reviewed last in 1994 and is marked as "needs review". There is an introduced presence of S. retroflexum in southeast China.
