Echinacea laevigata, the smooth purple coneflower, is an Endangered Species Act federally listed endangered species of plant found in the piedmont of the eastern United States. Most populations are found on roadsides and other open areas with plenty of sunlight, often on calcium- and magnesium- rich soils.
Thymophylla is a genus of perennial flowering plants in the marigold tribe within the sunflower family. Pricklyleaf is a common name for plants in this genus.
Krascheninnikovia lanata is a species of flowering plant in the amaranth family (Amaranthaceae), known by the common name winterfat. It is native to much of western North America: from central Western Canada; through the Western United States; to northern Mexico.
Dyssodia Cav. is a small genus of flowering plants in the daisy family. Most dyssodias are now treated as members of other related genera, including Thymophylla or Adenophyllum, with Dyssodia as genus synonym. Dyssodia papposa is usually retained in this genus. The name is derived from the Greek δυσοδια (dusodia), meaning "ill-smelling".
Blennosperma bakeri is a rare species of flowering plant in the daisy family known by the common names Baker's stickyseed and Sonoma sunshine. It is endemic to Sonoma County, California, where it is known from a few remaining vernal pool sites on the wet grasslands of the Laguna de Santa Rosa and Sonoma Valley. It is a federally listed endangered species. It is found alongside other rare vernal pool plants including the Sebastopol meadowfoam, Limnanthes vinculans, and Burke's goldfields, Lasthenia burkei. Threats to its survival include the alteration of its habitat for development, road maintenance, grazing, and agriculture, as well as collecting, herbivory by thrips, and invasive plants.
Pseudobahia bahiifolia is a rare species of flowering plant in the aster family known by the common name Hartweg's golden sunburst.
Pseudobahia peirsonii is a rare species of flowering plant in the aster family known by the common names San Joaquin adobe sunburst and Tulare pseudobahia. It is endemic to California, where it is known from a few mostly small occurrences along the southeastern side of the San Joaquin Valley where it rises into the Sierra Nevada foothills. It grows in grassland and oak woodland habitat. It prefers heavy adobe clay soils. The plant became a federally listed threatened of the United States in 1997.
Packera layneae, known by the common name Layne's ragwort and Layne's butterweed, is a rare species of flowering plant in the aster family.
Ambrosia cheiranthifolia is a rare species of flowering plant known by the common names South Texas ambrosia and Rio Grande ragweed. It is native to the coast of South Texas and the Mexican states of Tamaulipas and Coahuila. It occurs in coastal prairie, grassland, and mesquite shrubland habitat. It has declined because its native habitat has been cleared for development, with remaining open savanna invaded by non-native grasses such as buffelgrass. Today there are perhaps 20 populations remaining, but some of these may have very few genetic individuals because the species is clonal, with many cloned plants attached by one rhizome. It is not certain that the plant still exists in Mexico. This is a federally listed endangered species of the United States.
Aristida portoricensis is a rare species of grass known by the common name pelos del diablo. It is endemic to Puerto Rico, where it is known from two locations, one in a residential area of Mayagüez and one in the Sierra Bermeja. Two other known sites have been extirpated by development of the habitat. It is a federally listed endangered species of the United States.
Astragalus holmgreniorum is a rare species of milkvetch known by the common names Holmgren milkvetch and paradox milkvetch. It is native to a tiny section of desert shrub woodland on the border between Utah and Arizona, in the far northern Mojave Desert. There are six populations remaining. It is a federally listed endangered species.
Chrysopsis floridana is a rare species of flowering plant in the aster family, known by its common name, Florida golden aster. It is endemic to Florida in the United States, where it is known from Hillsborough, Hardee, Manatee, and Pinellas Counties. It is considered an endemic of the west-central coast of the state in the general vicinity of Tampa Bay. There are 17 to 20 occurrences, many of which have few individuals, but one of which has over one million plants. In 1986 the plant was added to the US endangered species list because it was becoming increasingly rare, it was growing only on private property, and its habitat was unprotected and being destroyed and degraded by a number of forces. It is found at Bell Creek Nature Preserve in Riverview, Florida.
Escobaria robbinsiorum is a rare species of cactus known by the common names Cochise pincushion cactus and Cochise foxtail cactus. It is native to southern Arizona in the United States, where it is known only from Cochise County, and northern Sonora in Mexico. There are scattered small occurrences on the north side of the border, and one known population to the south. Because of its rarity and a number of threats to remaining plants, the species was federally listed with a threatened status in 1986.
Erigeron rhizomatus is a rare species of flowering plant in the aster family known by the common names Zuni fleabane and rhizome fleabane. It is native to western New Mexico and eastern Arizona in the United States. It is a federally listed threatened species.
Frankenia johnstonii is a species of flowering plant known by the common name Johnston's seaheath, or Johnston's frankenia. It is native to southern Texas in the United States and northern Nuevo León in Mexico, where there are about 30 occurrences known. The plant was federally listed as an endangered species in the United States in 1984. It was found to be more abundant than previously thought and it was proposed for delisting in 2003.
Hymenoxys texana is a rare species of flowering plant in the aster family known by the common names prairie dawn, Texas prairie dawn-flower, and Texas bitterweed. It is endemic to Texas, where it is known only from the general vicinity of Houston. It is threatened by the loss of its habitat. It is a federally listed endangered species of the United States.
Phacelia argillacea is a rare species of flowering plant in the borage family known by the common names clay phacelia and Atwood's phacelia. It is endemic to Utah in the United States, where it is known only from one canyon in Utah County. It is "one of Utah's most endangered species"; it is "one of the nation's rarest plants" and is federally listed as an endangered species of the United States.
Spiranthes delitescens is a rare species of orchid known by the common names reclusive lady's tresses, Canelo Hills lady's tresses, and Madrean lady's tresses. It is native to Arizona in the United States, where there are only four occurrences. It is threatened by the loss and degradation of its habitat. It is a federally listed endangered species of the United States.
Townsendia aprica is a rare species of flowering plant in the aster family known by the common name Last Chance Townsend daisy. It is endemic to Utah in the United States, where it is known from three counties. It faces a number of threats and it is a federally listed threatened species of the United States.
Physaria thamnophila is a rare species of flowering plant in the mustard family known by the common name Zapata bladderpod. It is native to Texas in the United States, where it is known from Zapata and Starr Counties. The plant is threatened by the loss and degradation of its habitat. It is federally listed as an endangered species.
