Nolina is a genus of tropical xerophytic flowering plants, with the principal distribution being in Mexico and extending into the southern United States. They are large, dioecious plants.
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.
Encelia is a genus of the plant family Asteraceae. It consists of shrubs of arid environments in southwestern North America and western South America.
Bouteloua is a genus of plants in the grass family. Members of the genus are commonly known as grama grass.
Stephanomeria is a genus of North American plants also known as wirelettuce, belonging to the dandelion tribe within the sunflower family.
Trichostema is a genus of flowering plants in the family Lamiaceae, which are aromatic herbs or subshrubs. These plants are native to North America. Many plant of this genus which have whorls of small blue flowers are called by the common name bluecurls.
Isocoma, commonly called jimmyweed or goldenweed, is a genus of North American semi-woody shrubs in the family Asteraceae. It is found in the semi-arid areas of Southwestern United States and Mexico.
Houstonia (bluet) is a genus of plants in the family Rubiaceae. Many species were formerly classified, along with other genera since segregated elsewhere, in a more inclusive genus Hedyotis.
Hedeoma is a genus of flowering plants in the mint family, Lamiaceae. It is native to North and South America. They are commonly known as false pennyroyals.
Artemisia ludoviciana is a North American species of flowering plant in the daisy family Asteraceae, known by several common names, including silver wormwood, western mugwort, Louisiana wormwood, white sagebrush, and gray sagewort.
Arida is a genus of flowering plants in the daisy family, Asteraceae.
Hilaria is a genus of North American plants in the grass family. Members of the genus are commonly known as curly mesquite. They are found in the Southwestern United States, Mexico, and Guatemala.
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.
Amauriopsis is a genus of North American plants in the Spanish needles tribe within the daisy family. The plants grow in Mexico and the western United States.
Hymenothrix wrightii is a North American species of flowering plant in the daisy family. It grows in northwestern Mexico and the southwestern United States.
Hymenothrix wislizeni, the Trans-Pecos thimblehead, is a North American species of flowering plant in the daisy family. It grows in northwestern Mexico and the southwestern United States.
Hymenothrix loomisii, the Loomis' thimblehead, is a North American species of flowering plant in the daisy family. It grows in the southwestern United States, and also in the Sierra Madre Occidental in western Chihuahua. There have been reports of populations in southern California but these are most likely introductions.
Hymenothrix palmeri is a North American species of flowering plant in the daisy family. It has been found only in the state of Chihuahua in northern Mexico.
Rhinotropis is a small genus in the family Polygalaceae. It was separated as a genus from Polygala by J. Richard Abbott in 2011. It is native to the south and west of the United States and to Mexico.
Nolina beldingii is a species of perennial flowering plant in the family Asparagaceae known commonly as the Cape nolina or Belding's beargrass. It is an arborescent monocot growing up to 7 metres (23 ft) high, with fissured bark on a trunk topped with leaf rosettes. The narrow leaves are up to 1.15 m (3.8 ft) long, and are used as thatching by local peoples. This species is endemic to Baja California Sur in Mexico, where it grows only in the highest reaches of the Sierra de la Laguna. It is found primarily in oak forests at elevations over 1,000 m (3,300 ft) along rocky granite outcrops.
