Isoetes, commonly known as the quillworts, is the only extant genus of plants in the family Isoetaceae, which is in the class of lycopods. There are currently 192 recognized species, with a cosmopolitan distribution but with the individual species often scarce to rare. Some botanists split the genus, separating two South American species into the genus Stylites, although molecular data place these species among other species of Isoetes, so that Stylites does not warrant taxonomic recognition. Species of Isoetes virtually identical to modern forms have existed since the Jurassic epoch.
Gaillardia is a genus of flowering plants in the sunflower 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.
Gentianaceae is a family of flowering plants of 103 genera and about 1600 species.
Juncus is a genus of monocotyledonous flowering plants, commonly known as rushes. It is the largest genus in the family Juncaceae, containing around 300 species.
Echinocereus is a genus of ribbed, usually small to medium-sized, cylindrical cacti, comprising about 70 species native to the southern United States and Mexico in very sunny, rocky places. Usually the flowers are large and the fruit edible.
Baptisia is a genus in the legume family, Fabaceae. They are flowering herbaceous perennial plants with pea-like flowers, followed by pods, which are sometimes inflated. They are native to woodland and grassland in eastern and southern North America. The species most commonly found in cultivation is B. australis.
Phoradendron is a genus of mistletoe, native to warm temperate and tropical regions of the Americas. The center of diversity is the Amazon rainforest. Phoradendron is the largest genus of mistletoe in the Americas, and possibly the largest genus of mistletoes in the world. Traditionally, the genus has been placed in the family Viscaceae, but recent genetic research acknowledged by the Angiosperm Phylogeny Group shows this family to be correctly placed within a larger circumscription of the sandalwood family, Santalaceae.
Physostegia, the lionshearts or false dragonheads, is a genus of flowering plants in the family Lamiaceae, native to North America. They are erect rhizomatous herbaceous perennials inhabiting damp, sunny places. They grow up to 2 m (7 ft) tall with purple or pink tubular flowers in racemes in summer.
Valerianella is a genus of plant in family Caprifoliaceae. Many plants of this genus are known by the common name corn salad or cornsalad, although that name most often refers to Valerianella locusta.
Porlieria is a genus of flowering plants in the caltrop family, Zygophyllaceae. Species within this genus are shrubs or small trees of dry subtropical regions. The generic name honours Spanish ambassador Don Antonio Porlier de Baxamar.
Tetragonotheca is a genus of North American plants in the daisy family. Nerveray is a common name for plants in this genus.
Asarina is a flowering plant genus of only one species, Asarina procumbens, the trailing snapdragon, which is native to southern Europe. Originally placed in the Scrophulariaceae, the genus has more recently been moved to the Plantaginaceae. Species from North America formerly placed in the genus Asarina are now placed in Holmgrenanthe, Lophospermum, Mabrya and Maurandya, as well as Neogaerrhinum. Asarina is now regarded as exclusively an Old World genus.
Brazoria is a genus of plants in the family Lamiaceae, first described in 1845. It contains three known species, all endemic to the US State of Texas.
Brazoria truncata, common name rattlesnake flower, is a plant species in the family Lamiaceae, first described in 1834. It is endemic to Texas, found in the south-central and eastern parts of the state.
Helianthus praecox is a North American species of sunflower known by the common name Texas sunflower. It is endemic to Texas. Most of the populations are either along the Gulf Coast or in the Río Grande Valley.
Gaillardia suavis is a species of flowering plant in the sunflower family, common names pincushion daisy and perfumeballs. It is native to northern Mexico and the southern Great Plains of the United States.
Hypericum gymnanthum, the small-flowered St. John's wort or clasping leaf St. John's wort, is a species of flowering plant in the St. John's wort family Hypericaceae native to wet woods, bogs, and ditches of the eastern United States and Guatemala. It has been introduced to Poland.
Daucosma is a genus of flowering plants belonging to the family Apiaceae.
Seymeria is a genus of flowering plants belonging to the family Orobanchaceae.
