Platanthera leucophaea, commonly known as the prairie white fringed orchid or eastern prairie fringed orchid, is a rare species of orchid native to North America. It is a federally threatened species, protected since October 30, 1989 under the Endangered Species Act of 1973. In Canada, it has been listed endangered under Schedule 1 of the Species at Risk Act since 2005. In 2014, the International Union for Conservation of Nature assessed it as "least concern."
Platanthera yadonii, also known as Yadon's piperia or Yadon's rein orchid, is an endangered orchid endemic to a narrow range of coastal habitat in northern Monterey County, California. In 1998 this plant was designated as an endangered species by the United States government, the major threat to its survival being continuing land development from an expanding human population and associated habitat loss. One of the habitats of Yadon's piperia, the Del Monte Forest near Monterey, California, is the subject of a federal lawsuit, based upon endangerment of this organism along with several other endangered species.
The genus Platanthera belongs to the subfamily Orchidoideae of the family Orchidaceae, and comprises about 150 species of orchids. The members of this genus, known as the butterfly orchids or fringed orchids, were previously included in the genus Orchis, which is a close relative. They are distributed throughout the temperate regions of the Northern Hemisphere. They are terrestrial and have tubercules.
Platanthera blephariglottis, commonly known as the white fringed orchid or white-fringed orchis, is a species of orchid of the genus Platanthera. It is considered to be an endangered species in Connecticut and Ohio, a threatened species in Florida, Maryland and Rhode Island, exploitably vulnerable in New York, and susceptible to be threatened in Québec.
Platanthera grandiflora, the greater purple fringed orchid, is a species of orchid, genus Platanthera, occurring from Ontario to Newfoundland, south along the Appalachian Mountains to northeastern Georgia, with an isolated population in Illinois. It is imperiled in Georgia, Tennessee, Virginia and North Carolina and presumed extirpated in Ohio.
Platanthera huronensis, the Huron green orchid, is a species of orchid native to the United States and Canada. It has a discontinuous range, the eastern range including eastern Canada from eastern Manitoba to Labrador, plus New England and the Great Lakes states. The western range extends along the Rocky Mountains from New Mexico to Alberta, as well as the coastal ranges of Washington, British Columbia and southern Alaska.
Platanthera psycodes, commonly called lesser purple fringed orchid or small purple-fringed orchid, is a species of orchid, genus Platanthera, occurring from eastern Canada to the east-central and northeastern United States. It is imperiled in Illinois, Tennessee, North Carolina, and Kentucky.
Platanthera ephemerantha is a species of orchid known by the common names whiteflower rein orchid, slender white piperia, and white-flowered piperia. It is native to western North America from Alaska to the San Francisco Bay Area, where it grows in coniferous forests and other habitat in coastal and inland mountain ranges within 150 kilometers of the coast. It grows erect to about half a meter in maximum height from a bulbous caudex. The basal leaves are up to 18 centimeters long by 3 wide. Leaves higher on the stem are much reduced. The upper part of the stem is a spikelike inflorescence of up to 100 small flowers, mostly arranged along one side of the stem. The fragrant, honey-scented flowers are whiter than those of other Platanthera, but sometimes green-tinged or -veined, or green with white margins. The status of this species in the wild is difficult to determine because most populations are small and may produce flowers only rarely.
Platanthera tescamnis, the intermountain bog orchid or yellow rein orchid, is a species of orchid described in 2006. The plant is well-known but had been misidentified. It is native to the Great Basin and Colorado Plateau of the western United States, where it grows in warmer, drier habitat than most related orchids.
Platanthera hyperborea, the northern green orchid, is small orchid found only in Greenland, Iceland, and Akimiski Island in Canada. Numerous authors cite the species as widespread in other parts of Canada and also in the United States; such populations are more correctly referred to as Platanthera aquilonis.
Platanthera obtusata, common name blunt-leaved orchid or small northern bog orchid, is a small species of orchid in the genus Platanthera. It widespread across much of the colder regions of the Northern Hemisphere, though rare in some parts of its range. Two subspecies are recognized:
Platanthera flava, the palegreen orchid, is a species of pale-flowered orchid. It is native to eastern North America, from Texas east to Florida, north to Ontario, Quebec and Nova Scotia.
Platanthera orbiculata, the round leaved orchid or lesser roundleaved orchid, is a species of orchid native to forested areas of North America. It is widespread across most of Canada and parts of the United States.
Platanthera peramoena, the purple fringeless orchid, is a species of flowering plant in the orchid family. It is native to the Eastern United States, where it is found from the Mid-Atlantic states, the Ohio Valley and the Ozark Mountains. Its natural habitat is moist forests, marshes, and on streambanks.
Triphora trianthophoros, the threebirds or three birds orchid, or nodding pogonia, is a species of terrestrial orchid native to eastern North America.
Platanthera chapmanii, common name Chapman's fringed orchid, is an orchid that grows in Northern Florida and adjacent southeastern Georgia as well as in southeastern Texas. It is a monocot in the family Orchidaceae. It is part of the genus Platanthera, meaning wide anther in Latin.
Platanthera cristata, commonly known as the crested yellow orchid or the crested orange bog orchid, is a species of orchid, a flowering plant in the family Orchidaceae, native to North America. It was first formally described in 1835 by English botanist, John Lindley.
Platanthera dilatata, known as tall white bog orchid, bog candle, or boreal bog orchid is a species of orchid, a flowering plant in the family Orchidaceae, native to North America. It was first formally described in 1813 by Frederick Traugott Pursh as Orchis dilatata.
Platanthera integrilabia, commonly called white fringeless orchid, is a species of flowering plant in the orchid family (Orchidaceae). It is native to the Southeastern United States. Its natural habitat is in boggy acidic seeps and flats, usually in partial open sunlight.
Platanthera pallida, commonly known as pale fringed orchid, is a rare orchid of North America with the only known occurrences on Long Island.
