Gaillardia is a genus of flowering plants in the family Asteraceae, native to North and South America. It was named after Maître Gaillard de Charentonneau, an 18th-century French magistrate who was an enthusiastic botanist. The common name may refer to the resemblance of the inflorescence to the brightly patterned blankets made by Native Americans, or to the ability of wild taxa to blanket the ground with colonies. Many cultivars have been bred for ornamental use.
Palafoxia, or palafox, is a genus of North American flowering plants in the Bahia tribe within the Asteraceae.
Helenium is a genus of annuals and herbaceous perennial plants in the family Asteraceae, native to the Americas.
Bouteloua is a genus of plants in the grass family. Members of the genus are commonly known as grama grass.
Amsonia is a genus of flowering plants in the dogbane family, Apocynaceae, first described as a genus in 1788. It is native primarily to North America with one species in East Asia and another in the eastern Mediterranean. It was named in honor of the American physician John Amson. Members of the genus are commonly known as bluestars.
- Amsonia ciliataWalter – fringed bluestar – SE US, S Great Plains
- Amsonia elliptica(Thunb. ex Murray) Roem. & Schult. – Japanese bluestar – China, Japan, Korea
- Amsonia fugateiS.P.McLaughlin – San Antonio bluestar – New Mexico
- Amsonia grandifloraAlexander – Arizona bluestar – Arizona, Sonora, Durango
- Amsonia hubrichtiiWoodson – Hubricht's bluestar – Arkansas, Oklahoma
- Amsonia illustrisWoodson – Ozark bluestar – Mississippi Valley, also Nevada
- Amsonia jonesiiWoodson – Jones' bluestar – Arizona, New Mexico, Utah, Colorado
- Amsonia kearneyanaWoodson – Kearney's bluestar – Baboquivari in Pima Co. in Arizona
- Amsonia longifloraTorr. – tubular bluestar – Arizona, New Mexico, Texas, Coahuila
- Amsonia ludovicianaVail – Louisiana bluestar – Louisiana, Mississippi, Georgia
- Amsonia orientalisDecne. – European bluestar – Greece, Turkey
- Amsonia palmeriA.Gray – Palmer's bluestar – Arizona, New Mexico, Texas, Sonora, Chihuahua
- Amsonia peeblesiiWoodson – Peebles' bluestar – Arizona
- Amsonia repensShinners – creeping bluestar – E Texas, SW Louisiana
- Amsonia rigidaShuttlw. ex Small – stiff bluestar – from Georgia to Louisiana
- Amsonia tabernaemontanaWalter – eastern bluestar – S + C + E United States
- Amsonia tharpiiWoodson – feltleaf bluestar – W Texas, SE New Mexico
- Amsonia tomentosaTorr. & Frém. – woolly bluestar – SW US; Chihuahua
Houstonia caerulea, commonly known as azure bluet, Quaker ladies, or bluets, is a perennial species in the family Rubiaceae. It is native to eastern Canada and the eastern United States. It is found in a variety of habitats such as cliffs, alpine zones, forests, meadows and shores of rivers or lakes.
Oldenlandiopsis (creeping-bluet) is a genus of flowering plants in the family Rubiaceae. It is monospecific, comprising only one species, Oldenlandiopsis callitrichoides. This species had previously been placed in Hedyotis or in Oldenlandia. It is native to the West Indies, southern Mexico, and Central America. It is naturalized elsewhere, including Florida, Hawaii, South America, and tropical Africa.
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.
Hymenothrix is a small genus of North American flowering plants in the daisy family known as thimbleheads. They are native to the southwestern United States and northern Mexico.
Houstonia longifolia, commonly known as long-leaved bluet or longleaf summer bluet, is a perennial plant in the family Rubiaceae. It can be found throughout most of the Eastern United States and Canada. It has been reported from every state east of the Mississippi River except Delaware, plus North Dakota, Minnesota, Missouri, Arkansas and Oklahoma, with isolated populations in Kansas and Texas. Also, all Canadian provinces from Quebec to Alberta. It prefers upland woods in poor, dry, often sandy soil.
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.
Houstonia acerosa, the New Mexico bluet or needleleaf bluet, is a plant species native to Chihuahua, Coahuila, Nuevo León, Tamaulipas, San Luis Potosí, Texas and New Mexico.
Houstonia palmeri, the Saltillo bluet, is a plant species in the family Rubiaceae, native to the Mexican states of Coahuila and Nuevo León.
Houstonia humifusa, commonly called matted bluet, is a plant species in the coffee family (Rubiaceae). It is native to the United States, where it is found in Texas, Oklahoma, and New Mexico. It is typically found in sandy areas, or sometimes over gypsum.
Houstonia rosea, the rose bluet, is a North American plant species in the coffee family. It is a tiny plant only a few centimeters tall, with pink flowers. It is native to the south-central United States: Texas, Oklahoma, Arkansas, Louisiana, Mississippi, Alabama and southern Missouri.
Houstonia rubra, the red bluet, is a plant species in the Rubiaceae. It is a small herb with red to reddish-purple flowers, native to the southwestern United States and northern and central Mexico: Coahuila, Nuevo León, Hidalgo, Zacatecas, Guanajuato, Puebla, Sonora, Durango, Chihuahua, Arizona, New Mexico, southeastern Utah and western Texas.
Houstonia serpyllifolia, commonly called thymeleaf bluet, creeping bluet, mountain bluet, Appalachian bluet or Michaux's bluets is a species of plant in the coffee family (Rubiaceae). It is native to the eastern United States, where it is found in the central and southern Appalachian Mountains. It has been documented in the states of Pennsylvania, Maryland, West Virginia, western Virginia, North Carolina, South Carolina, Kentucky, Tennessee, Ohio, and northeastern Georgia.
Houstonia wrightii, the pygmy bluet, is a plant species in the Rubiaceae. It is native to the south-western United States and northern Mexico.
Stenaria is a genus of flowering plants in the family Rubiaceae. It is a small genus, consisting of around six species native to the United States, Mexico, and The Bahamas. All species of Stenaria are restricted to Mexico and the southwestern United States, except for the wide-ranging Stenaria nigricans which extends northward and eastward.
