Spiranthes parksii

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Navasota lady's tresses

Vulnerable (NatureServe)[1]
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Monocots
Order: Asparagales
Family: Orchidaceae
Genus: Spiranthes
Species: S. parksii
Binomial name
Spiranthes parksii
Correll[2]

Spiranthes parksii, the Navasota lady's tresses,[3] is a species of orchid that is endemic to Texas, United States. The flower was first discovered in 1945 and was first described by Donovan Stewart Correll in his 1950 book, Native Orchids of North America North of Mexico.

Description[edit]

Spiranthes parksii is a slender-stemmed perennial, 8–15 inches (200–380 mm) tall. Leaves are long and thin and found mostly near the ground level, but usually disappear when the flower buds. Flowers petals are round or oval and off-white in color. The flowers typically spiral up the stem. Conspicuously white-tipped bracts occur underneath each 14-inch-long (6.4 mm) flower. The side petals have a green central stripe, and the lip (bottom petal) is distinctly ragged.

Habitat and range[edit]

Navasota lady's tresses is primarily found in the East Central Texas forests, usually along creeks in the Brazos and Navasota River watersheds. In 1982, when the species was listed as endangered, only two populations were believed to exist, both in Brazos County. Since then, biologists have identified the species in Bastrop, Burleson, Fayette, Freestone, Grimes, Jasper, Leon, Madison, Milam, Robertson, and Washington Counties.[4] The population in Jasper County is disjunct and the only one that occurs in the Piney Woods.[5]

Conservation[edit]

Navasota lady's tresses was listed as an endangered species by the United States Fish and Wildlife Service (USFWS) in May 1982. The decline of the plant is mostly due to loss of habitat from human encroachment and activity.[4]

References[edit]

  1. ^ "Spiranthes parksii - Correll Navasota Ladies'-tresses". NatureServe Explorer. NatureServe. Retrieved 2013-02-08. 
  2. ^ "Taxon: Spiranthes parksii Correll". Germplasm Resources Information Network. United States Department of Agriculture. 2000-03-23. Retrieved 2013-02-08. 
  3. ^ "Spiranthes parksii". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 27 November 2015. 
  4. ^ a b "Navasota Ladies'-tresses (Spiranthes parksii)". Texas Parks and Wildlife. Retrieved 2013-02-08. 
  5. ^ Pelchat, Cliff (March 2005). "Spiranthes parksii Correll - Navasota Ladies' Tresses". The McAllen International Orchid Society Journal. 6 (2): 9–15.