Penstemon debilis, the Parachute penstemon or Parachute beardtongue, is one of the rarest plants in North America, found only 5 places in the world, all of them located on the Roan Plateau in Garfield County, of Western Colorado. The Denver Botanic Gardens has the Parachute penstemon on display with other native plants of the Roan Plateau. The name Parachute comes from the small town in Colorado, Parachute, Colorado, close to where the plant can be found.
Ipomopsis aggregata is a species of flowering plant in the phlox family (Polemoniaceae), commonly known as scarlet trumpet, scarlet gilia, or skyrocket because of its scarlet red flowers with lobes curving back as if blown back by rocketing through the air.
Arctomecon californica is a species of poppy known by several common names, including California bearpoppy, Las Vegas bearpoppy, golden bearpoppy, and yellow-flowered desert poppy.
Astragalus osterhoutii is a rare species of milkvetch known by the common name Osterhout milkvetch. It is endemic to Grand County, Colorado, where it is known from a few populations in Middle Park, a mountain basin. There are five or six occurrences. It is a federally listed endangered species.
Clematis socialis is a rare species of flowering plant in the buttercup family known by the common name Alabama leather flower. It is native to the US states of Alabama and Georgia, where it is known from only five populations. The species is seriously threatened by habitat destruction. It is a federally listed endangered species.
Conradina etonia is a rare species of shrub in the mint family known by the common name Etonia rosemary. It is endemic to Putnam County, Florida, where it is known from about 8 populations on Etoniah Creek State Forest containing fewer than 1000 total individuals. It has a specific habitat requirement and the main threat it faces is destruction and degradation of its habitat. 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.
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.
Phacelia formosula is a rare species of flowering plant in the borage family known by the common name North Park phacelia. It is endemic to the state of Colorado in the United States, where it is known only from the North Park region in Jackson County. It is threatened by a number of human activities, such as motorcycle and off-road vehicle use in its habitat. It is a federally listed endangered species of the United States.
Polygala 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.
Glaucocarpum is a monotypic plant genus containing the single species Glaucocarpum suffrutescens, a rare species of flowering plant in the mustard family known by the common names Uinta Basin waxfruit, waxfruit mustard, toad-flax cress, and shrubby reed-mustard. It is endemic to Utah in the United States, where it is known only from Duchesne and Uintah Counties. It is threatened by habitat degradation and destruction. It is federally listed as an endangered species of the United States.
Spiranthes diluvialis is a rare species of orchid known as Ute lady's tresses. The species name diluvialis means "of the flood". It is native to the western United States, where there are scattered, mostly small occurrences in the states of Colorado, Idaho, Montana, Nebraska, Nevada, Utah, Washington, and Wyoming. An occurrence was recently discovered in southern British Columbia. The plant faces a number of threats to its existence. It is a federally listed threatened species of the United States.
Phacelia submutica is a rare species of flowering plant in the borage family known by the common name De Beque phacelia. It is endemic to Colorado in the United States, where it is limited to the Piceance Basin in two counties. It is threatened by petroleum exploration. It was federally listed as a threatened species of the United States on July 27, 2011, a ruling which took effect on August 26, 2011.
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.
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.
Penstemon grahamii, known by the common names Uinta Basin beardtongue and Graham's beardtongue, is a species of flowering plant in the plantain family. It is native to Utah and Colorado in the United States.
Phacelia covillei is a North American species of annual forbs in the borage family. It is native to the eastern and central United States in scattered locations from Missouri to Maryland and North Carolina.
Physaria congesta is a rare species of flowering plant in the mustard family known by the common name Dudley Bluffs bladderpod. It is endemic to western Colorado in the United States, where it is known only from seven occurrences in Rio Blanco County. It is federally listed as a threatened species.
Physaria pruinosa is a species of flowering plant in the family Brassicaceae known by the common names Pagosa Springs bladderpod and frosty bladderpod. It is native to Colorado and New Mexico in the United States.
