Cynoglossum officinaleL.

hound's-tongue

WFO wfo-0000634152 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Cynoglossum officinale, photographed by John G. Phillips
fig. a John G. Phillips, CC BY 4.0 / 2022-06-13 / obs. 205932905
Cynoglossum officinale, photographed by Екатерина Гущина
fig. b Екатерина Гущина, CC BY 4.0 / obs. 204689704
Cynoglossum officinale, photographed by Yann Kemper
fig. c Yann Kemper, CC0 1.0 / obs. 204133415
Cynoglossum officinale, photographed by Aleksei Baushev
fig. d Aleksei Baushev, CC BY 4.0 / obs. 203319594
Cynoglossum officinale, photographed by Вячеслав Юсупов
fig. e Вячеслав Юсупов, CC BY 4.0 / obs. 203415088
Cynoglossum officinale, photographed by Sue Carnahan
fig. f Sue Carnahan, CC BY 4.0 / obs. 205872133
Cynoglossum officinale, photographed by Opal
fig. g Opal, CC BY 4.0 / obs. 202974179
Cynoglossum officinale, photographed by Yann Kemper
fig. h Yann Kemper, CC0 1.0 / obs. 203289049

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.

Flowering n = 1,536 observations

Peak flowering in May, from 1,536 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 9 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.

  • Cynoglossum album Gueldenst. ex Ledeb.
  • Cynoglossum bicolor Willd.
  • Cynoglossum bicolor Willd.
  • Cynoglossum foetens Gilib.
  • Cynoglossum hybridum Thuill.
  • Cynoglossum hybridum Thuill.
  • Cynoglossum paucisetum Borbás
  • Cynoglossum ruderale Salisb.
  • Cynoglossum vulgare Gueldenst. ex Ledeb.

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.