Lupinus perennisL.

Sundial Lupine

WFO wfo-0000213846 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Lupinus perennis, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2022-06-11 / obs. 205672907

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 = 1,554 observations

Flowering observations of Lupinus perennis by month
MonthObservations
Jan1
Feb1
Mar38
Apr112
May795
Jun519
Jul56
Aug16
Sep12
Oct4
Nov0
Dec0

Peak flowering in May, from 1,554 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 12 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.

  • Lupinus gracilis Nutt.
  • Lupinus microphyllus Nutt.
  • Lupinus nuttallii S.Watson
  • Lupinus perennis f. albiracemus A.H.Moore
  • Lupinus perennis f. bicolor Farw.
  • Lupinus perennis f. gracilis (Chapm.) Voss
  • Lupinus perennis f. leucanthus Fernald
  • Lupinus perennis f. perennis
  • Lupinus perennis f. rosea Britton
  • Lupinus perennis var. gracilis Chapm.
  • Lupinus perennis var. occidentalis S.Watson
  • Lupinus perennis var. perennis

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.