Helianthus is a genus comprising about 70 species of annual and perennial flowering plants in the daisy family Asteraceae commonly known as sunflowers. Except for three South American species, the species of Helianthus are native to North America and Central America. The best-known species is the common sunflower, whose round flower heads in combination with the ligules look like the Sun. This and other species, notably Jerusalem artichoke, are cultivated in temperate regions and some tropical regions as food crops for humans, cattle, and poultry, and as ornamental plants. The species H. annuus typically grows during the summer and into early fall, with the peak growth season being mid-summer.
Carphochaete is a genus of North American flowering plants in the family Asteraceae. They are native to Mexico and the southwestern United States. They are known commonly as bristleheads.
Flourensia is a genus of flowering plants in the family Asteraceae. It contains subshrubs and shrubs, which are commonly known as tarworts. They are found in the southwestern United States, Mexico, Central America, and South America. The genus name honours French physiologist Jean Pierre Flourens (1794–1867).
Flourensia cernua is a species of flowering plant in the aster family known by the English common names American tarwort and tarbush and the Spanish common names hojasé, hojasén, and hoja ancha. It is native to the Chihuahuan Desert of North America, where it occurs in the US states of Arizona, New Mexico, and Texas, and the Mexican states of Sonora, Chihuahua, Coahuila, Durango, San Luis Potosí, and Zacatecas. Most of the species in the genus are found in Latin America; this and F. pringlei are the only two species whose ranges extend into the United States.
Bidens lemmonii is a North American species of flowering plant in the family Asteraceae. It is native to the southwestern United States and Mexico.
Bidens tenuisecta , the slim lobe beggarticks, is a North American species of flowering plant in the family Asteraceae. It is native to northern Mexico (Chihuahua) and the western United States. There are also reports of populations in the northeastern United States but these are almost assuredly introductions.
Brickellia eupatorioides, or false boneset, is a North American species of flowering plants in the family Asteraceae. It is widespread in Mexico from Chihuahua to Oaxaca, and in all regions of the contiguous United States except New England, New York, and the West Coast.
Brickellia laciniata, the splitleaf brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northeastern and north-central Mexico and the southwestern United States.
Brickellia lemmonii, or Lemmon's brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northeastern and north-central Mexico and the southwestern United States.
Brickellia pringlei, or Pringle's brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northern Mexico and the southwestern United States.
Brickellia rusbyi, the stinking brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northern Mexico and the southwestern United States.
Brickellia simplex, the Sonoran brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northern Mexico and the southwestern United States.
Brickellia betonicifolia, the betonyleaf brickellbush, is a Mexican species of flowering plants in the family Asteraceae. It is native to northwestern Mexico, in the States of Baja California, Sonora, Chihuahua, and Durango and the southwestern United States.
Brickellia floribunda, the Chihuahuan brickellbush, is a North American species of flowering plants in the family Asteraceae. It is native to northern Mexico and the south-western United States.
Carphochaete bigelovii, common name Bigelow's bristlehead, is a species of North American flowering plants in the family Asteraceae. They are native to northern Mexico and the southwestern United States.
Coreocarpus arizonicus, the little lemonhead, is a North American species of flowering plants in the daisy family native to northwestern Mexico and the southwestern United States. It has been found in southern Arizona, and in the adjacent Mexican States of Sonora, Chihuahua, Sinaloa, and Baja California Sur.
Erigeron oreophilus is a North American species of flowering plant in the family Asteraceae, called the chaparral fleabane. It is native to northern Mexico and the southwestern United States.
Helianthus laciniatus is a North American species of sunflower known by the common name alkali sunflower. It is found in the southwestern United States and north-central Mexico. It is fairly common in the Chihuahuan Desert.
Gutierrezia wrightii is a North American species of flowering plant in the family Asteraceae known by the common name Wright's snakeweed. It is native to the southwestern United States and northwestern Mexico.
Hieracium pringlei, common name Pringle's hawkweed, is a North American plant species in the dandelion tribe within the sunflower family. It is native to Mexico with additional populations in Guatemala, Arizona, and New Mexico.
