Ageratina (snakeroot) is a genus of more than 330 perennials and rounded shrubs in the family Asteraceae.
Ageratina altissima, also known as white snakeroot, richweed, or white sanicle, is a poisonous perennial herb in the family Asteraceae, native to eastern and central North America. An older binomial name for this species is Eupatorium rugosum, but the genus Eupatorium has undergone taxonomic revision by botanists, and a number of the species that were once included in it have been moved to other genera.
Eupatorium is a genus of flowering plants in the aster family, Asteraceae, containing from 36 to 60 species depending on the classification system. Most are herbaceous perennials growing to 0.5–3 m (1.6–9.8 ft) tall. A few are shrubs. The genus is native to temperate regions of the Northern Hemisphere. Most are commonly called bonesets, thoroughworts or snakeroots in North America. The genus is named for Mithridates Eupator, king of Pontus.
Ageratina shastensis is a species of snakeroot which is endemic to Shasta County, California. It is known by the common names Mt. Shasta snakeroot and Shasta eupatorium.
Cirsium arizonicum, the Arizona thistle, is a North American species of thistle in the sunflower family, native to the southwestern United States and northwestern Mexico. It has been found in Arizona, southeastern California, New Mexico, Nevada, Colorado, Utah, Sonora, and northwestern Chihuahua.
Dulichium is a monotypic genus of sedge containing the single species Dulichium arundinaceum, which is known by the common name threeway sedge. This is an aquatic or semi-aquatic plant of the lakes, streams, and ponds of the United States and Canada It has a wide distribution across the two countries, though noticeably absent from the Dakotas and from the Southwestern Deserts.
Ageratina herbacea is a North American species of flowering plants in the daisy family known by the common names fragrant snakeroot and Apache snakeroot. It is native to desert regions of the southwestern United States and northern Mexico. It grows in rocky slopes in conifer forests and woodlands.
Ageratina occidentalis is a species of flowering plant in the daisy family known by the common name western snakeroot or western eupatorium. It is native to the western United States where it grows in several types of habitat. It is found in California, Oregon, Washington, Idaho, Montana, Nevada, and Utah.
Ageratina adenophora, commonly known as Crofton weed, is a species of flowering plant in the daisy family native to Mexico and Central America. Originally grown as an ornamental plant, it has become invasive into farmland and bushland worldwide. It is toxic to horses, who develop a respiratory disease known as Numinbah Horse Sickness after eating it.
Artemisia rothrockii is a North American species of sagebrush known by the common names timberline sagebrush and Rothrock's sagebrush.
Ageratina havanensis, the Havana snakeroot or white mistflower, is a species of flowering shrub in the sunflower family, native to Texas, Cuba, and northeastern and east-central Mexico. Unlike many other species of Ageratina, it is evergreen.
Ageratina luciae-brauniae is a species of flowering plant in the aster family known by the common names Lucy Braun's snakeroot and rockhouse white snakeroot. It is native to the eastern United States, where it is limited to the Cumberland Plateau of Kentucky and Tennessee. It may also occur in South Carolina but these reports are unconfirmed.
Townsendia rothrockii is a species of flowering plant in the aster family known by the common name Rothrock's Townsend daisy. It is endemic to Colorado in the United States, where there are 35 occurrences across thirteen counties. Reports of the plant from New Mexico are false.
Ageratina aromatica, also known as lesser snakeroot and small-leaved white snakeroot, is a North American species of plants in the sunflower family. It is widespread and common across much of the eastern and southern United States from Louisiana to Massachusetts, as far inland as Kentucky and Ohio.
Ageratina jucunda, called the Hammock snakeroot, is a North American species of plants in the sunflower family. It is found only in the southeastern United States, in the states of Georgia and Florida.
Ageratina lemmonii, called the Lemmon's snakeroot, is a North American species of plants in the sunflower family. It is found only in the southwestern United States in the states of Arizona and New Mexico, as well as the states of Sonora, Sinaloa, Chihuahua and Durango in Mexico.
Ageratina paupercula, called the Santa Rita snakeroot, is a North American species of shrubs or perennial herbs in the sunflower family. It is found only in the states of Arizona, Sonora, Chihuahua, Durango, Nayarit, and Jalisco.
Ageratina thyrsiflora is a North American species of plants in the sunflower family. It is native mostly to northwestern Mexico. The range extends just barely into the United States, a single herbarium specimen having been collected in 1929 just north of the border town of Nogales, Arizona.
Ageratina wrightii is a North American species of plants in the sunflower family. It is native to the southwestern United States and northern Mexico.
Carex bebbii, Bebb's sedge, is a species of sedge native to the northern United States and Canada. Carex bebbii grows in a variety of wetland habitats such as lakeshores, streambanks, ditches, meadows, swamps, and seeps. It forms dense tufts with culms up to 90 centimeters tall.
