Lepidium lasiocarpum (shaggyfruit pepperweed)

Plate 1 figs. a–h · 8 separate observations

Lepidium lasiocarpum, photographed by Tim Messick — fig. a Tim Messick, CC BY 4.0 / 2022-04-25 / obs. 194188571

Lepidium lasiocarpum, photographed by Cricket Raspet — fig. b Cricket Raspet, CC BY 4.0 / obs. 188442190

Lepidium lasiocarpum, photographed by Bobby McCabe — fig. c Bobby McCabe, CC BY 4.0 / obs. 185104096

Lepidium lasiocarpum, photographed by Eric Knight — fig. e Eric Knight, CC BY 4.0 / obs. 181976928

Lepidium lasiocarpum, photographed by Trevor Van Loon — fig. g Trevor Van Loon, CC BY 4.0 / obs. 179338666

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 Lepidium lasiocarpum, 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
Mexican Pacific Is.	MXI
Mexico Central	MXC
Mexico Northeast	MXE
Mexico Northwest	MXN
Mexico Southwest	MXS
Nevada	NEV
New Mexico	NWM
Texas	TEX
Utah	UTA

Not drawn on the map: Mexican Pacific Is.. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

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 453 in flower of 697 examined

62%

86%

73%

50%

15%

17%

42%

60%

Proportion of examined Lepidium lasiocarpum in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	28	45	62%	48% to 75%
Feb	128	148	86%	80% to 91%
Mar	205	282	73%	67% to 78%
Apr	71	142	50%	42% to 58%
May	5	34	15%	6% to 30%
Jun	1	4	too few examined
Jul	0	0	too few examined
Aug	0	0	too few examined
Sep	0	9	0%	0% to 30%
Oct	1	6	17%	3% to 56%
Nov	5	12	42%	19% to 68%
Dec	9	15	60%	36% to 80%

Peak flowering in Feb. Each bar is the share of Lepidium lasiocarpum 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. 453 of 697 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 3 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 15 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.

Lepidium georginum Rydb.
Lepidium lasiocarpum subsp. georginum Thell.
Lepidium lasiocarpum var. georginum C.L.Hitchc.
Lepidium lasiocarpum var. lasiocarpum
Lepidium lasiocarpum var. latifolium C.L.Hitchc.
Lepidium lasiocarpum var. palmeri (S.Watson) C.L.Hitchc.
Lepidium lasiocarpum var. rosulatum C.L.Hitchc.
Lepidium lasiocarpum var. rotundum C.L.Hitchc.
Lepidium lasiocarpum var. wrightii C.L.Hitchc.
Lepidium nelsonii L.O.Williams
Lepidium palmeri S.Watson
Lepidium ruderale var. lasiocarpum Engelm. ex A.Gray
Lepidium wrightii A.Gray
Nasturtium lasiocarpum Kuntze
Nasturtium wrightii Kuntze

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.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. 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.