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. 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.
Sagittaria is a genus of about 30 species of aquatic plants whose members go by a variety of common names, including arrowhead, Katniss, duck potato, swamp potato, tule potato, and wapato. Most are native to South, Central, and North America, but there are also some from Europe, Africa, and Asia.
Agastache is a genus of aromatic flowering herbaceous perennial plants in the family Lamiaceae. It contains 22 species, mainly native to North America, one species native to eastern Asia. The common names of the species are a variety of fairly ambiguous and confusing "hyssops" and "mints"; as a whole the genus is known as giant hyssops or hummingbird mints.
Bouteloua is a genus of plants in the grass family. Members of the genus are commonly known as grama grass.
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.
Muhlenbergia is a genus of plants in the grass family.
Forsteronia is a genus of plants in the family Apocynaceae, first described as a genus in 1818. It is native to South America, Central America, Mexico, and the West Indies.
Amsonia tomentosa is a species of flowering plant native to the southwestern United States and northern Mexico (Chihuahua). Its common names include woolly bluestar and gray amsonia.
Hymenopappus is a genus of flowering plants in the daisy family. Many species are known as woollywhites.
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.
Ratibida is a genus of North American plants in the tribe Heliantheae within the family Asteraceae. Members of the genus are commonly known as prairie coneflowers or mexican-hat.
Amsonia kearneyana is a rare species of flowering plant in the dogbane family known by the common name Kearney's bluestar. It is native to Arizona, where there is only one native population in the Baboquivari Mountains of Pima County. There may also be a population just south of the border in Sonora, Mexico. The plant was federally listed as an endangered species in 1989. At that time the global population of the plant was made up of eight individuals in a riparian canyon. Since that time the plant has been manually propagated in an attempt to increase its numbers. Threats to the tiny native population include habitat destruction from livestock activity and flash floods in the river canyon. Many of the plants cannot reproduce because their seeds are sterile and nonviable, but this is probably due to insect predation on the seeds as they develop.
Haplophyton is a genus of plants in the family Apocynaceae, first described in 1844. It is native to the southwestern United States, Mexico, Cuba, and Guatemala. It is a suffrutescent herb with alternative leaves and showy colorful flowers.
Diaperia verna, common names spring pygmycudweed, spring rabbit-tobacco or many-stem rabbit-tobacco, is a plant species in the sunflower family, native to northern Mexico and the southern United States.
Amsonia jonesii is a plant in the bluestar genus Amsonia known by the common name Colorado desert bluestar. It is in the dogbane family, but a separate genus. It grows in the deserts surrounding the Colorado River in the United States. It is now grown as a garden plant for its masses of light blue flowers and low water usage.
