Eurybia macrophylla, commonly known as the bigleaf aster, large-leaved aster, largeleaf aster or bigleaf wood aster, is an herbaceous perennial in the family Asteraceae that was formerly treated in the genus Aster. It is native to eastern North America, with a range extending from eastern and central Canada through the northeastern deciduous and mixed forests of New England and the Great Lakes region and south along the Appalachians as far as the northeastern corner of Georgia, and west as far as Minnesota, Missouri and Arkansas. The flowers appear in the late summer to early fall and show ray florets that are usually either a deep lavender or violet, but sometimes white, and disc florets that are cream-coloured or light yellow, becoming purple as they mature. It is one of the parent species of the hybrid Eurybia × herveyi.
Helenium autumnale is a North American species of flowering plants in the family Asteraceae. Common names include common sneezeweed and large-flowered sneezeweed.
Helenium amarum is a species of annual herb in the daisy family known by the common names yellowdicks, yellow sneezeweed, fiveleaf sneezeweed, and bitter sneezeweed. It is native to much of the south-central United States and northern Mexico, and it is present elsewhere in North America, Australia, and the West Indies as an introduced species.
Helenium bolanderi is a North American species of flowering plant in the daisy family known by the common name coastal sneezeweed. It is native to southern Oregon and northern California as far south as Mendocino County, primarily along the seacoast.
Helenium puberulum is a North American species of flowering plants in the daisy family known by the common name rosilla. It is native to California and Baja California, where it can be found in moist habitats such as riverbanks and meadows. It has also been found in Oregon, although these might possibly be naturalized populations.
Cirsium discolor, the field thistle, is a North American species of plants in the tribe Cardueae within the family Asteraceae. It is native to thirty-three states in the United States as well four Canadian provinces. It occurs across much of eastern and central Canada as well as eastern and central United States. It has been found from New Brunswick west to Saskatchewan and south as far as Texas and Georgia.
Helenium virginicum is a rare species of flowering plant in the aster family known by the common name Virginia sneezeweed. It occurs in the United States, where it has a disjunct distribution; it is known only from Virginia and Missouri. It is limited to a specific type of habitat and it is threatened by modification of this habitat. It was federally listed as a threatened species of the United States in 1998.
Erigeron pulchellus, the Robin's plantain, blue spring daisy or hairy fleabane, is a North American species of plants in the family Asteraceae. It is widespread across much of the United States and Canada from Québec and Ontario south as far as eastern Texas and the Florida Panhandle.
Gaillardia aestivalis is a species of flowering plant in the aster family known by the common name lanceleaf blanketflower. It is native to the south-central and southern United States from Texas east to Florida and north to the Carolinas, Arkansas, and Kansas. There are also reports of historical populations in Missouri and introduced populations in Nebraska. It is also cultivated as an ornamental plant.
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.
Cirsium texanum is a species of plants in the tribe Cardueae within the family Asteraceae found in North America. Common names include Texas thistle, Texas purple thistle or southern thistle. The species is native to northern Mexico and the southern Great Plains of the south-central United States.
Erigeron pringlei is a North American species of flowering plant in the family Asteraceae known by the common name Pringle's fleabane. It has been found in only in the state of Arizona in the southwestern United States.
Erigeron pulcherrimus is a North American species of flowering plant in the family Asteraceae known by the common name basin fleabane. The species grows in the western United States in the eastern part of the Intermountain Region west of the Rocky Mountains. It has been found in Wyoming, Colorado, Utah, New Mexico, and Arizona.
Solidago riddellii, known as Riddell's goldenrod, is a North American plant species in the genus Solidago of the family Asteraceae. It grows primarily in the Great Lakes and eastern Great Plains of Canada and the United States. It is sometimes considered part of the genus Oligoneuron, but as a Solidago, included in the section Solidago sect. Ptarmicoidei, the flat-topped goldenrods.
Helenium arizonicum is a North American perennial plant in the Sunflower Family, commonly known as Arizona sneezeweed. It is native only to Arizona in the southwestern United States, having been found only in four counties in that state: Apache, Navajo, Gila, and Coconino.
Helenium brevifolium is a North American perennial plant in the sunflower family, commonly known as shortleaf sneezeweed. It is native to the southeastern United States, from Virginia to eastern Louisiana and inland as far as Tennessee.
Helenium campestre is a North American perennial plant in the sunflower family, commonly known as oldfield sneezeweed. It is native to the southeastern United States, in Arkansas and northwestern Louisiana.
Helenium drummondii is a species of perennial plant in the Sunflower Family, commonly known as fringed sneezeweed. It is native to the south- central United States, in eastern Texas, Arkansas, and Louisiana.
Flaveria brownii, or Brown's yellowtops, is a North American plant species of Flaveria within the family Asteraceae. It is found only in the coastal regions of southern Texas in the United States. It grows primarily in sand dunes and salt marshes.
Lactuca ludoviciana, the biannual lettuce, is a North American species of wild lettuce. It is widespread across much of central and western Canada and the western and central United States from Ontario west to British Columbia and south to Louisiana, Texas, and California. Most of the known populations are on the Great Plains; populations west of there may well represent naturalizations.
