Thelypodium laciniatum (cutleaf thelypody)

Plate 1 figs. a–h · 8 separate observations

Thelypodium laciniatum, photographed by Trevor Van Loon — fig. a Trevor Van Loon, CC BY 4.0 / 2022-05-28 / obs. 202169040

Thelypodium laciniatum, photographed by Nolan Exe — fig. b Nolan Exe, CC BY 4.0 / obs. 201579940

Thelypodium laciniatum, photographed by Drew Meyer — fig. c Drew Meyer, CC0 1.0 / obs. 134980926

Thelypodium laciniatum, photographed by Jon Eilers — fig. e Jon Eilers, CC0 1.0 / obs. 69059745

Thelypodium laciniatum, photographed by Jim Dreier — fig. f Jim Dreier, CC BY 4.0 / obs. 68578712

Thelypodium laciniatum, photographed by James H. Thomas — fig. g James H. Thomas, CC BY 4.0 / obs. 202045014

Thelypodium laciniatum, photographed by marek — fig. h marek, CC0 1.0 / obs. 194617357

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 6 botanical countries

Native distribution of Thelypodium laciniatum, 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
British Columbia	BRC	NORTHERN AMERICA
California	CAL
Idaho	IDA
Nevada	NEV
Oregon	ORE
Washington	WAS

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 70 in flower of 82 examined

67%

98%

100%

Proportion of examined Thelypodium laciniatum in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	0	3	too few examined
Apr	12	18	67%	44% to 84%
May	42	43	98%	88% to 100%
Jun	13	13	100%	77% to 100%
Jul	2	3	too few examined
Aug	0	0	too few examined
Sep	0	0	too few examined
Oct	1	2	too few examined
Nov	0	0	too few examined
Dec	0	0	too few examined

Peak flowering in Jun. Each bar is the share of Thelypodium laciniatum 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. 70 of 82 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 9 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 8 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.

Cardamine laciniata (Hook.) Steud.
Dentaria americana Bartr. ex DC.
Macropodium laciniatum Hook.
Pachypodium laciniatum (Hook.) Nutt. ex Torr. & A.Gray
Thelypodium laciniatum var. laciniatum
Thelypodium laciniatum var. streptanthoides (Leiberg ex Piper) Payson
Thelypodium leptosepalum Rydb.
Thelypodium streptanthoides Leiberg ex Piper

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.