Delphinium nuttallianumPritz.

upland larkspur

WFO wfo-0000640455 Accepted WFO 2026-06 7 photographs CC0 / CC BY

Plate 1 figs. a–g

Delphinium nuttallianum, photographed by Shane Johnson
fig. a Shane Johnson, CC0 1.0 / 2022-06-06 / obs. 204759909
Delphinium nuttallianum, photographed by Shane Johnson
fig. b Shane Johnson, CC0 1.0 / obs. 204749718
Delphinium nuttallianum, photographed by Shane Johnson
fig. c Shane Johnson, CC0 1.0 / obs. 204755213
Delphinium nuttallianum, photographed by Shane Johnson
fig. d Shane Johnson, CC0 1.0 / obs. 204744304
Delphinium nuttallianum, photographed by Shane Johnson
fig. e Shane Johnson, CC0 1.0 / obs. 204558148
Delphinium nuttallianum, photographed by Shane Johnson
fig. f Shane Johnson, CC0 1.0 / obs. 204546631
Delphinium nuttallianum, photographed by Shane Johnson
fig. g Shane Johnson, CC0 1.0 / obs. 202468840

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 = 2,322 observations

Peak flowering in May, from 2,322 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 18 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.

  • Delphinastrum nelsonii (Greene) Nieuwl.
  • Delphinastrum nuttallianum Nieuwl.
  • Delphinium bicolor var. nelsonii (Greene) K.C.Davis
  • Delphinium decorum var. nevadense S.Watson
  • Delphinium dumetorum Greene
  • Delphinium leonardii Rydb.
  • Delphinium menziesii var. utahense S.Watson
  • Delphinium nelsonii Greene
  • Delphinium nelsonii f. dumetorum (Greene) Ewan
  • Delphinium nelsonii f. pinetorum (Tidestr.) Ewan
  • Delphinium nelsonii subsp. utahense (S.Watson) Ewan
  • Delphinium nuttallianum var. levicaule C.L.Hitchc.
  • Delphinium nuttallianum var. nuttallianum
  • Delphinium nuttallianum var. pilosum C.L.Hitchc.
  • Delphinium pauciflorum var. depauperatum A.Gray
  • Delphinium pauciflorum var. nevadense A.Gray
  • Delphinium pinetorum Tidestr.
  • Delphinium sonnei Greene

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.