Spiranthes cernua (L.) Rich.
Nodding ladies' tresses orchid, Nodding ladies' tresses, Ladies' tresses
Orchidaceae (Orchid Family)
Synonym(s): Ibidium cernuum, Spiranthes cernua var. incurva
USDA Symbol: spce
Few people would guess that Spiranthes flowers are orchids, a fact that may help save them from collectors. The narrow, grasslike leaves are 8-10 inches long, growing from the base of the plant. The flowers are white and grow along the upper part of the slender, erect stem, which is 1-2 feet tall. They grow in 2-4 spiraling rows, forming a dense spike 6 inches long. The individual flowers, about 1/2 inch long, curve downward slightly, nodding. The lip is about 1/2 inch long, with a flaring, crimped margin. This is one of the few orchids that have a fragrance.
A dozen or more species of Ladies-tresses are known in the eastern United States. Among those with pronounced spirals are Slender Ladies-tresses (S. lacera), with ovate leaves and a green spot on the lip; Short-lipped Ladies-tresses (S. brevilabris), with a downy floral spike; and Little Ladies-tresses (S. tuberosa), with tiny flowers. In southern marshes and swamps Fragrant Ladies-tresses (S. odorata), grows to 2-3 (60-90 cm) and has spirally arranged clusters of fragrant flowers.
From the Image Gallery
Bloom InformationBloom Color: White , Purple
Bloom Time: Jul , Aug
DistributionUSA: AL , AR , CT , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , ND , NE , NH , NJ , NM , NY , OH , OK , PA , RI , SC , SD , TN , VA , VT , WI , WV
Canada: NB , NS , ON , PE
Native Distribution: Ontario to Nova Scotia and northern New England; south to Florida; west to Texas; north to South Dakota.
Native Habitat: Fields, damp meadows, moist thickets, and grassy swamps.
Growing ConditionsWater Use: High
Light Requirement: Sun
Soil Moisture: Moist
CaCO3 Tolerance: Low
Soil Description: Clay, Loam, Sand
BenefitUse Medicinal: Plant tea used as a diuretic for urinary disorders, venereal disease, and as a wash to strengthen infants. (Foster & Duke)
Conspicuous Flowers: yes
Fragrant Flowers: yes
National Wetland Indicator Status
From the National Suppliers DirectoryAccording to the inventory provided by Associate Suppliers, this plant is available at the following locations:
ArcheWild Native Nurseries - Quakertown, PA
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
Crosby Arboretum - Picayune, MS
BibliographyBibref 417 - Field Guide to Medicinal Plants and Herbs of Eastern and Central North America (2000) Foster, S. & J. A. Duke
Bibref 946 - Gardening with Prairie Plants: How to Create Beautiful Native Landscapes (2002) Wasowski, Sally
Bibref 248 - Texas Wildflowers: A Field Guide (1984) Loughmiller, C. & L. Loughmiller
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
Search More Titles in Bibliography
Additional resourcesUSDA: Find Spiranthes cernua in USDA Plants
FNA: Find Spiranthes cernua in the Flora of North America (if available)
Google: Search Google for Spiranthes cernua
MetadataRecord Modified: 2014-10-14
Research By: TWC Staff