Orchidaceae
Hooded lady's tresses
Spiranthes romanzoffiana
- Family
- Orchidaceae
- Genus
- Spiranthes
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Common names
By language (4)
- arz
- سبيرانثيس رومانزوفيانا
- Chinese
- 羅氏綬草
- English
- Hooded lady's tresses, Hooded ladies'-tresses, Hooded ladiestresses, Irish lady's tresses
- Welsh
- Troellig Wyddelig
Synonyms
- Gyrostachys gemmipara (Sm.) Kuntze
- Gyrostachys romanzoffiana (Cham.) MacMill.
- Gyrostachys stricta Rydb.
- Ibidium romanzoffianum (Cham.) House
- Ibidium romanzoffianum var. strictum (Rydb.) Daniels
- Ibidium strictum (Rydb.) House
- Neottia gemmipara Sm.
- Orchiastrum romanzoffianum (Cham.) Greene
- Spiranthes gemmipara (Sm.) Lindl.
- Spiranthes pauciflora Raf.
- Spiranthes romanzoffiana var. gemmipara (Sm.) Kreutz & M.H.Schot
- Spiranthes romanzoffiana var. romanzoffiana
- Spiranthes romanzoffiana var. stricta (Rydb.) Druce
- Spiranthes stricta (Rydb.) A.Nelson
- Triorchis romanzoffianus (Cham.) Nieuwl.
- Triorchis strictus (Rydb.) Nieuwl.
- Triorchos romanzoffianus (Cham.) Nieuwl.
Flowers
- In flower
- July to August (from 805 flowering iNaturalist observations worldwide)
- Flower colour
- white (USDA PLANTS Database)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Alaska: native, Canada: native, Lower 48 states: native, St. Pierre and Miquelon: native
Photos
FlowerPhoto: Irene, CC0, from iNaturalist 
FlowerPhoto: Irene, CC0, from iNaturalist 
FlowerPhoto: user12, CC BY 4.0, from iNaturalist 
FlowerPhoto: Irene, CC0, from iNaturalist 
Photo: Eric in SF, CC BY-SA 3.0, from Wikimedia Commons 
Photo: Ed Alverson, CC BY 4.0, from iNaturalist 
Photo: Dcrjsr, CC BY 3.0, from Wikimedia Commons 
Photo: Dcrjsr, CC BY 3.0, from Wikimedia Commons 
Photo: Krazytea, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Patrick Sowers, CC0, from iNaturalist 
Photo: Allefant, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Aiva Noringseth, CC BY 4.0, from iNaturalist
More in Spiranthes
- Autumn lady's-tressesSpiranthes spiralisOrchidaceae
- Summer lady's-tressesSpiranthes aestivalisOrchidaceae
- Chinese spiranthesSpiranthes sinensisOrchidaceae
- Nodding lady's tressesSpiranthes cernuaOrchidaceae
- Shining lady's tressesSpiranthes lucidaOrchidaceae
- Yellow nodding lady's tressesSpiranthes ochroleucaOrchidaceae
- Spring lady's tressesSpiranthes vernalisOrchidaceae
- Marsh lady's tressesSpiranthes odorataOrchidaceae
- Texas lady's tressesSpiranthes brevilabrisOrchidaceae
- Case's lady's tressesSpiranthes caseiOrchidaceae
- Eaton's lady's tressesSpiranthes eatoniiOrchidaceae
- Ash Meadows lady's tressesSpiranthes infernalisOrchidaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.