Spiranthes romanzoffianaCham.

Hooded Ladies' Tresses

WFO wfo-0000313409 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Spiranthes romanzoffiana, photographed by Elias
fig. a Elias, CC BY 4.0 / 2021-08-03 / obs. 148400110
Spiranthes romanzoffiana, photographed by Caleb Catto
fig. b Caleb Catto, CC BY 4.0 / obs. 148990510
Spiranthes romanzoffiana, photographed by Todd Boland
fig. c Todd Boland, CC BY 4.0 / obs. 150028114
Spiranthes romanzoffiana, photographed by Jason Grant
fig. d Jason Grant, CC BY 4.0 / obs. 144046124
Spiranthes romanzoffiana, photographed by Quinten Wiegersma
fig. e Quinten Wiegersma, CC BY 4.0 / obs. 145836909
Spiranthes romanzoffiana, photographed by Quinten Wiegersma
fig. f Quinten Wiegersma, CC BY 4.0 / obs. 148663340
Spiranthes romanzoffiana, photographed by Matt Berger
fig. g Matt Berger, CC BY 4.0 / obs. 145307291
Spiranthes romanzoffiana, photographed by Nelson Balcar
fig. h Nelson Balcar, CC BY 4.0 / obs. 149853510

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 736 observations

Peak flowering in Aug, from 736 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 17 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • 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.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.