Cypripedium kentuckiense (Kentucky lady's slipper)

Plate 1 figs. a–h · 8 separate observations

Cypripedium kentuckiense, photographed by Reid Hardin — fig. a Reid Hardin, CC BY 4.0 / 2022-04-30 / obs. 194511610

Cypripedium kentuckiense, photographed by Brian Finzel — fig. b Brian Finzel, CC BY-SA 4.0 / obs. 179215687

Cypripedium kentuckiense, photographed by Miranda Kohout — fig. c Miranda Kohout, CC0 1.0 / obs. 71247080

Cypripedium kentuckiense, photographed by Michelle W. （鍾偉瑋） — fig. d Michelle W. （鍾偉瑋）, CC BY 4.0 / obs. 64580119

Cypripedium kentuckiense, photographed by Anne Parker — fig. h Anne Parker, CC BY 4.0 / obs. 198762179

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 10 botanical countries

Native distribution of Cypripedium kentuckiense, 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
Alabama	ALA	NORTHERN AMERICA
Arkansas	ARK
Georgia	GEO
Kentucky	KTY
Louisiana	LOU
Mississippi	MSI
Oklahoma	OKL
Tennessee	TEN
Texas	TEX
Virginia	VRG

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 49 in flower of 58 examined

60%

83%

92%

Proportion of examined Cypripedium kentuckiense in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	3	5	60%	23% to 88%
Apr	10	12	83%	55% to 95%
May	35	38	92%	79% to 97%
Jun	1	1	too few examined
Jul	0	0	too few examined
Aug	0	1	too few examined
Sep	0	1	too few examined
Oct	0	0	too few examined
Nov	0	0	too few examined
Dec	0	0	too few examined

Peak flowering in May. Each bar is the share of Cypripedium kentuckiense 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. 49 of 58 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 3 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.

Cypripedium daultonii V.G.Soukup
Cypripedium kentuckiense f. pricei P.M.Br.
Cypripedium kentuckiense f. summersii P.M.Br.

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.