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Spiranthes romanzoffiana (Hooded ladies'-tresses)
Weyand, Phyllis

Spiranthes romanzoffiana

Spiranthes romanzoffiana Cham.

Hooded Ladies'-tresses, Hooded Lady's Tresses

Orchidaceae (Orchid Family)

Synonym(s): Ibidium strictum, Spiranthes stricta


USDA Native Status: L48 (N), AK (N), CAN (N), SPM (N)

1 stem, or several in a clump, with 3-6 leaves near base and up to 60 creamy white bilaterally symmetrical flowers blooming in 1-4 gently spiraled rows in a dense spike.

Western Ladies'-tresses (S. porrifolia), which grows in similar habitats from southern California to southern Washington and also in northern Utah, has a triangular lip barely constricted behind the tip, the sepals only about 3/8" (9 mm) long.


From the Image Gallery

7 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Leaf: Green

Bloom Information

Bloom Color: White
Bloom Time: Jul , Aug , Sep , Oct


USA: AK , AZ , CA , CO , CT , IA , ID , IL , IN , MA , ME , MI , MN , MT , ND , NE , NH , NM , NV , NY , OH , OR , PA , SD , UT , VT , WA , WI , WY
Canada: NB , NL , NS , PE
Native Distribution: Southern California to New Mexico; north through most of northern North America.
Native Habitat: Generally moist open places, but variable, occurring from coastal bluffs to high in the mountains.

Growing Conditions

Water Use: High
Light Requirement: Part Shade
CaCO3 Tolerance: Low


Conspicuous Flowers: yes

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Additional resources

USDA: Find Spiranthes romanzoffiana in USDA Plants
FNA: Find Spiranthes romanzoffiana in the Flora of North America (if available)
Google: Search Google for Spiranthes romanzoffiana


Record Modified: 2019-12-03
Research By: TWC Staff

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