Eriogonum parvifolium is a species in the family Polygonaceae that occurs on dune formations in the coastal area of Central and Southern California. This evergreen shrub grows to a height of 30 to 100 centimeters with a spread of approximately the same dimension. This plant is an important host for a number of pollinating insects including certain endangered species. E. parvifolium occurs both on bluffs along the Pacific Ocean coast as well as Coastal Strand dunes formations, but is restricted to altitudes below 700 meters. In at least one instance within the Carbonera Creek watershed, it occurs farther inland in a Maritime Coast Range Ponderosa Pine forest. This shrub is also known by the common names dune buckwheat, coast buckwheat, cliff buckwheat, or seacliff buckwheat.
Eriogonum alpinum is a species of wild buckwheat known by the common name Trinity buckwheat.
Eriogonum eremicola is a rare species of wild buckwheat known by the common names Telescope Peak buckwheat and Wild Rose Canyon buckwheat. It is endemic to Inyo County, California, where it is known from only a few occurrences in the Inyo Mountains and Telescope Peak in Death Valley. It grows in sandy to rocky habitat in the forests and woodlands of these desert mountains. It is an annual herb producing a spreading, glandular, reddish green stem up to about 25 centimeters tall. The rounded, woolly leaves are up to about 2.5 centimeters long and are located at the base of the stem. The scattered inflorescences are small clusters of tiny flowers which are white with reddish stripes, aging to solid red, or sometimes yellow. The plant is under protection in Death Valley National Park.
Eriogonum rixfordii is an uncommon species of wild buckwheat known by the common name pagoda buckwheat. It is native to the Mojave Desert, where it grows in California's Death Valley and adjacent parts of Nevada.
Eriogonum callistum is a rare species of wild buckwheat, known by the common name Tehachapi buckwheat.
Eriogonum evanidum is a rare species of wild buckwheat known by the common name vanishing wild buckwheat. It is native to southern California and Baja California, where it has been collected from widely scattered areas. Most historical occurrences are now extirpated. Some sources suggested that it was probably extinct, but living specimens were rediscovered in 2007.
Eriogonum spectabile is a rare species of wild buckwheat known by the common name Barron's buckwheat. It is endemic to Plumas County, California, where it is known from two occurrences in Lassen National Forest near Chester. There are approximately 250 individuals in existence. It grows in scrubby, forested mountain habitat, only on glaciated andesite substrates. This rare plant was discovered in 1997 and described to science as a new species in 2001.
Eriogonum gypsophilum is a rare species of wild buckwheat known by the common names Seven River Hills buckwheat and gypsum wild buckwheat. It is endemic to the state of New Mexico in the United States, where it is known from only three sites in Eddy County. It is limited to a specific type of soil which is high in gypsum. The plant has been federally listed as a threatened species of the United States since 1981.
Eriogonum pelinophilum is a rare species of wild buckwheat known by the common name clay-loving wild buckwheat. It is endemic to the state of Colorado in the United States, where it is known from only two counties. The most recent estimates available suggest there are 12 occurrences in existence for a total of about 278,000 individual plants in Delta and Montrose Counties. At least 7 occurrences observed in the past have not been relocated but are not yet believed extirpated. This plant is federally listed as an endangered species of the United States.
Lepidium barnebyanum is a rare species of flowering plant in the family Brassicaceae known by the common names Barneby's pepperweed, Barneby's pepper-grass, and Barneby's ridge-cress. It is endemic to Utah, where there is a single population in Duchesne County. It is a federally listed endangered species of the United States.
Penstemon penlandii is a rare species of flowering plant in the plantain family known by the common names Penland penstemon and Penland's beardtongue. It is endemic to Colorado in the United States, where it is known only from a strip of land about five miles long in central Grand County. There are two occurrences totalling about 8600 individuals. This is a federally listed endangered species of the United States.
Senega lewtonii is a rare species of flowering plant in the milkwort family known by the common name Lewton's polygala, or Lewton's milkwort. It is endemic to Florida in the United States, where it is limited to the central ridge of the peninsula. There are about 49 occurrences of the plant remaining. Most occurrences contain very few plants. The species is threatened by the loss and degradation of its habitat. This is a federally listed endangered species of the United States.
Astragalus limnocharis var. montii, synonym Astragalus montii, is a rare variety of flowering plant in the legume family. It is known by the common name Monti's milkvetch. It is endemic to Utah in the United States, where there are only three known populations. Under the synonym A. montii, it is a federally listed threatened species of the United States.
Primula capillaris is a rare species of flowering plant in the primrose family known by the common name Ruby Mountains primrose, or Ruby Mountain primrose. It is endemic to Nevada in the United States, where it is limited to the Ruby Mountains of Elko County.
Castilleja salsuginosa is a species of flowering plant in the family Orobanchaceae known by the common name Monte Neva Indian paintbrush. It is endemic to Nevada in the United States, where it is known from two populations, one in White Pine County and another in Eureka County. The two occurrences of this plant are located about 83 miles (134 km) apart within the Great Basin. There are only about 275 individuals.
Eriogonum codium is a species of wild buckwheat known by the common names basalt desert buckwheat and Umtanum Desert wild buckwheat. It is endemic to Washington in the United States, where it is known only from Hanford Reach National Monument in Benton County. It was discovered in 1995 during an inventory of the biodiversity of the monument and described to science in 1997.
Eriogonum crosbyae is a species of wild buckwheat known by the common name Crosby's buckwheat. It is native to southcentral Oregon and northwestern Nevada in the United States. Some treatments include plants in Montana and Idaho as members of this species. This plant was first discovered in the Guano Valley in Lake County, Oregon, in 1978 by Bureau of Land Management botanist Virginia Crosby, and it was named for her in 1981.
Eriogonum diatomaceum is a species of wild buckwheat known by the common name Churchill Narrows buckwheat. It is endemic to Nevada in the United States, where it is known only from the Pine Nut Mountains in Lyon County. It is limited to the Churchill Narrows near Fort Churchill State Historic Park. This plant was discovered in 1997 and described to science in 2002.
Eriogonum brandegeei is a species of flowering plant in the buckwheat family known by the common name Brandegee's buckwheat. It is endemic to Colorado in the United States, where it occurs in Fremont and Chaffee Counties.
Eriogonum tiehmii, known as Tiehm's buckwheat, is a species of flowering plant endemic to the Silver Peak Range of Esmeralda County, Nevada, in the United States. Its only known population is at high risk of destruction due to proposed mining for lithium by Australian company Ioneer. In 2020, a noticeable decline in the known population was attributed to herbivory.
