Helenium is a genus of annuals and herbaceous perennial plants in the family Asteraceae, native to the Americas.
Helenium autumnale is a North American species of flowering plants in the family Asteraceae. Common names include common sneezeweed and large-flowered sneezeweed.
Helenium bigelovii is a North American perennial plant in the sunflower family, commonly known as Bigelow's sneezeweed. It grows in moist areas such as meadows, marshes, or streamsides. It is found at moderate and higher elevations (3000-10,000 ft) in the foothills and mountains of California and Oregon: Cascades, Coast Ranges, Klamath Mountains, Sierra Nevada, etc. Cultivars of the species are used in gardening as ornamentals.
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.
Hymenoxys hoopesii is a species of flowering plant in the daisy family known by the common names owl's claws, orange sneezeweed, and yerba del lobo. It is native to the western United States, where it grows in habitats of moderate elevation, such as mountain meadows in the Rocky Mountains, Sierra Nevada, southern Cascades, and other ranges. It has been found from Arizona, New Mexico, and central California north as far as Montana and Oregon.
Pilostyles thurberi is a species of endoparasitic flowering plant known by the common names Thurber's stemsucker and Thurber's pilostyles. It is native to the southwestern United States and northern Mexico, where it grows in desert and woodland. In the United States, P. thurberi has been recorded from the states of Arizona, California, New Mexico, Nevada, Texas.
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.
Helenium flexuosum is a North American plant species in the daisy family known by the common name purple sneezeweed. It is widespread across much of eastern and central United States and Canada, from Nova Scotia west to Ontario, Minnesota, and Kansas, south to Florida, Louisiana, and eastern Texas.
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.
Helenium elegans is a North American perennial plant in the sunflower family, commonly known as pretty sneezeweed. It is native to the south-central United States and to northeastern Mexico.
Helenium linifolium is a North American perennial plant in the sunflower family, commonly known as slimleaf sneezeweed. It is found only in southern Texas.
Helenium microcephalum is a North American perennial plant in the sunflower family, commonly known as smallhead sneezeweed. It is found in the southwestern and south-central United States and northern Mexico.
Helenium pinnatifidum is a North American perennial plant in the sunflower family, commonly known as southeastern sneezeweed. It is found in the southeaster United States.
Helenium quadridentatum is a North American plant in the sunflower family, commonly known as longdisk sneezeweed. It is found in the southeastern and south-central United States as well as Mexico, Cuba, Guatemala, and Belize.
Helenium vernale is a North American species of flowering plant in the aster family known by the common name Savanna sneezeweed or spring sneezeweed. It is native to the southeastern United States, from Louisiana to the Carolinas.
