Scoliopus bigeloviiTorr.

California fetid adderstongue

WFO wfo-0000740470 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Scoliopus bigelovii, photographed by Tom and T Herman
fig. a Tom and T Herman, CC BY 4.0 / 2022-05-27 / obs. 201161538

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 = 2,113 observations

Flowering observations of Scoliopus bigelovii by month
MonthObservations
Jan730
Feb1040
Mar251
Apr38
May5
Jun0
Jul1
Aug0
Sep0
Oct0
Nov0
Dec48

Peak flowering in Feb, from 2,113 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.

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.