Penstemon digitalisNutt. ex Sims

foxglove beardtongue

WFO wfo-0001136588 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Penstemon digitalis, photographed by pachips
fig. a pachips, CC BY 4.0 / 2022-06-10 / obs. 205034303
Penstemon digitalis, photographed by Ryan Sorrells
fig. b Ryan Sorrells, CC BY 4.0 / obs. 205628739
Penstemon digitalis, photographed by Tanya Riseman
fig. c Tanya Riseman, CC BY 4.0 / obs. 204433937
Penstemon digitalis, photographed by Jeff Clark
fig. d Jeff Clark, CC BY 4.0 / obs. 201977857
Penstemon digitalis, photographed by Ryan Sorrells
fig. e Ryan Sorrells, CC BY 4.0 / obs. 200172758
Penstemon digitalis, photographed by Stephanie Dolrenry
fig. f Stephanie Dolrenry, CC BY-SA 4.0 / obs. 199177077
Penstemon digitalis, photographed by Mac Post
fig. g Mac Post, CC BY 4.0 / obs. 199680869
Penstemon digitalis, photographed by Robert Hoard
fig. h Robert Hoard, CC0 1.0 / obs. 201426572

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 = 2,821 observations

Peak flowering in Jun, from 2,821 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 8 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.

  • Chelone digitalis (Nutt.) Sweet
  • Penstemon alluviorum Pennell
  • Penstemon digitalis f. baueri Steyerm.
  • Penstemon digitalis var. albidus Trautv.
  • Penstemon digitalis var. latifolius Regel
  • Penstemon laevigatus subsp. alluviorum (Pennell) R.W.Benn.
  • Penstemon laevigatus subsp. digitalis (Nutt.) R.W.Benn.
  • Penstemon laevigatus var. digitalis (Nutt.) A.Gray

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.