Keckiella antirrhinoides (snapdragon penstemon)

Plate 1 figs. a–h · 8 separate observations

Keckiella antirrhinoides, photographed by Millie Basden — fig. a Millie Basden, CC BY 4.0 / 2022-05-01 / obs. 193628081

Keckiella antirrhinoides, photographed by Madeleine Claire — fig. c Madeleine Claire, CC BY 4.0 / obs. 188796634

Keckiella antirrhinoides, photographed by James Fowler — fig. d James Fowler, CC BY 4.0 / obs. 189495008

Keckiella antirrhinoides, photographed by Marc Whitaker — fig. e Marc Whitaker, CC BY 4.0 / obs. 187407717

Keckiella antirrhinoides, photographed by Dan Horowitz — fig. f Dan Horowitz, CC0 1.0 / obs. 188830571

Keckiella antirrhinoides, photographed by Rachel Allingham — fig. h Rachel Allingham, CC BY 4.0 / obs. 183799988

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 4 botanical countries

Native distribution of Keckiella antirrhinoides, 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
Mexico Northwest	MXN
Nevada	NEV

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 303 in flower of 428 examined

29%

33%

57%

85%

94%

85%

29%

53%

20%

Proportion of examined Keckiella antirrhinoides in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	4	14	29%	12% to 55%
Feb	13	39	33%	21% to 49%
Mar	40	70	57%	45% to 68%
Apr	117	137	85%	79% to 90%
May	97	103	94%	88% to 97%
Jun	17	20	85%	64% to 95%
Jul	1	2	too few examined
Aug	0	2	too few examined
Sep	0	5	0%	0% to 43%
Oct	2	7	29%	8% to 64%
Nov	10	19	53%	32% to 73%
Dec	2	10	20%	6% to 51%

Peak flowering in May. Each bar is the share of Keckiella antirrhinoides 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. 303 of 428 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 2 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 13 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.

Keckia antirrhinoides (Benth.) Straw
Keckia antirrhinoides subsp. microphylla (A.Gray) Straw
Keckia antirrhinoides var. microphylla (A.Gray) Straw
Keckiella antirrhinoides subsp. antirrhinoides
Keckiella antirrhinoides subsp. microphylla (A.Gray) Straw
Lepidostemon penstemonoides Lem.
Penstemon antirrhinoides Benth.
Penstemon antirrhinoides subsp. antirrhinoides
Penstemon antirrhinoides subsp. microphyllus (A.Gray) D.D.Keck
Penstemon antirrhinoides var. microphyllus (A.Gray) Munz & I.M.Johnst.
Penstemon lobbii Lem.
Penstemon microphyllus A.Gray
Penstemon plummerae Abrams

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.