Streptanthus longirostris (longbeak streptanthella)

Plate 1 figs. a–h · 8 separate observations

Streptanthus longirostris, photographed by Bobby McCabe — fig. a Bobby McCabe, CC BY 4.0 / 2022-05-03 / obs. 194532347

Streptanthus longirostris, photographed by Mitch Van Dyke — fig. b Mitch Van Dyke, CC BY 4.0 / obs. 63986173

Streptanthus longirostris, photographed by Bob Miller — fig. c Bob Miller, CC BY 4.0 / obs. 61698923

Streptanthus longirostris, photographed by Tyler Hacking — fig. d Tyler Hacking, CC BY 4.0 / obs. 43200351

Streptanthus longirostris, photographed by Jim Morefield — fig. e Jim Morefield, CC BY 4.0 / obs. 54025393

Streptanthus longirostris, photographed by Scott Loarie — fig. g Scott Loarie, CC0 1.0 / obs. 3150816

Streptanthus longirostris, photographed by Dominic Gentilcore — fig. h Dominic Gentilcore, CC BY 4.0 / obs. 134492682

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.

Native range 12 botanical countries

Native distribution of Streptanthus longirostris, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.

Region	TDWG code	Continent
Arizona	ARI	NORTHERN AMERICA
California	CAL
Colorado	COL
Idaho	IDA
Mexico Northwest	MXN
Montana	MNT
Nevada	NEV
New Mexico	NWM
Oregon	ORE
Utah	UTA
Washington	WAS
Wyoming	WYO

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 138 in flower of 158 examined

67%

92%

95%

91%

87%

Proportion of examined Streptanthus longirostris in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	14	21	67%	45% to 83%
Feb	34	37	92%	79% to 97%
Mar	42	44	95%	85% to 99%
Apr	32	35	91%	78% to 97%
May	13	15	87%	62% to 96%
Jun	2	2	too few examined
Jul	0	0	too few examined
Aug	0	0	too few examined
Sep	0	0	too few examined
Oct	0	0	too few examined
Nov	0	2	too few examined
Dec	1	2	too few examined

Peak flowering in Mar. Each bar is the share of Streptanthus longirostris observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 138 of 158 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 7 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 10 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.

Arabis longirostris S.Watson
Erysimum longirostre (S.Watson) Kuntze
Euklisia longirostris (S.Watson) Rydb.
Guillenia longirostris (S.Watson) Greene
Guillenia rostrata Greene
Streptanthella longirostris Rydb.
Streptanthella longirostris var. derelicta J.T.Howell
Streptanthella longirostris var. longirostris
Thelypodium longirostre (S.Watson) Jeps.
Thelypodium longirostris (S.Watson) Jeps.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
USDA PLANTS Database. common name, checklist symbol STLO4. public domain. Retrieved 2026-07-13.
Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.