Corydalis incisa (incised fumewort)

Plate 1 figs. a–h · 8 separate observations

Corydalis incisa, photographed by Emily Summerbell — fig. a Emily Summerbell, CC BY 4.0 / 2022-05-03 / obs. 195226809

Corydalis incisa, photographed by Timur Kalininsky — fig. b Timur Kalininsky, CC BY 4.0 / obs. 203796316

Corydalis incisa, photographed by Taro Ietaka — fig. c Taro Ietaka, CC BY 4.0 / obs. 190062456

Corydalis incisa, photographed by Allen Browne — fig. e Allen Browne, CC0 1.0 / obs. 188190152

Corydalis incisa, photographed by mami_t_t — fig. f mami_t_t, CC BY 4.0 / obs. 187245357

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 7 botanical countries

Native distribution of Corydalis incisa, 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. Regions too small to draw at this scale are marked with a dot.

Region	TDWG code	Continent
China North-Central	CHN	ASIA-TEMPERATE
China South-Central	CHC
China Southeast	CHS
Japan	JAP
Korea	KOR
Nansei-shoto	NNS
Taiwan	TAI

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 891 in flower of 1,200 examined

55%

96%

86%

Proportion of examined Corydalis incisa in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	12	0%	0% to 24%
Feb	3	85	4%	1% to 10%
Mar	194	352	55%	50% to 60%
Apr	575	600	96%	94% to 97%
May	119	138	86%	80% to 91%
Jun	0	0	too few examined
Jul	0	0	too few examined
Aug	0	0	too few examined
Sep	0	0	too few examined
Oct	0	1	too few examined
Nov	0	4	too few examined
Dec	0	8	0%	0% to 32%

Peak flowering in Apr. Each bar is the share of Corydalis incisa 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. 891 of 1,200 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 6 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.

Capnoides incisa Kuntze
Corydalis incisa f. bicolor Hayashi
Corydalis incisa f. candida Hiyama
Corydalis incisa f. liuchiuensis Nakai
Corydalis incisa f. pallescens Makino
Corydalis incisa var. alba S.Y.Wang
Corydalis incisa var. koreana Fedde
Corydalis incisa var. pseudomakinoana Fedde
Corydalis incisa var. tschekiangensis Fedde
Fumaria incisa Thunb.

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 COIN21. 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.