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Spiranthes porrifolia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Orchidoideae
Tribe:	Cranichideae
Genus:	Spiranthes
Species:	S. porrifolia
Binomial name
	Spiranthes porrifolia; Lindl.

Spiranthes porrifolia is a species of orchid known by the common names creamy lady's tresses^[1] and western ladies' tresses. It is native to the western United States from Washington and Idaho to southern California.^[2] It can be found in moist habitats, such as mountain meadows, swamps, fens, and riverbanks.^[2] It is a perennial herb growing from a tuberous root system, reaching a maximum height around 60 cm (24 in).^[2] The leaves are mainly located around the base of the erect stem. They are linear or lance-shaped, or sometimes nearly oval. The top of the stem is occupied by the inflorescence, a dense spiral of many flowers. Each flower is somewhat tubular, with an upper and lower lip, and cream to yellowish in color.^[2]

The specific epithet porrifolia is Latin for "leek-leaved".^{[citation needed]}

References

^ NRCS. "Spiranthes porrifolia". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 27 November 2015.
^ ^a ^b ^c ^d Sheviak, Charles J.; Brown, Paul Martin (2002). "Spiranthes porrifolia". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 26. New York and Oxford: Oxford University Press. Retrieved 2018-11-09 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.