Solidago mexicana

Plate 1 figs. a–h · 8 separate observations

Solidago mexicana, photographed by ncb1221 — fig. b ncb1221, CC BY 4.0 / obs. 182109875

Solidago mexicana, photographed by Lyndsey — fig. c Lyndsey, CC BY 4.0 / obs. 171215485

Solidago mexicana, photographed by Jade Fortnash — fig. d Jade Fortnash, CC0 1.0 / obs. 168881264

Solidago mexicana, photographed by Brian Gratwicke — fig. e Brian Gratwicke, CC BY 4.0 / obs. 143379245

Solidago mexicana, photographed by Lauren McLaurin — fig. f Lauren McLaurin, CC BY 4.0 / obs. 122742688

Solidago mexicana, photographed by Steven Joyner — fig. g Steven Joyner, CC BY 4.0 / obs. 107463493

Solidago mexicana, photographed by natalie — fig. h natalie, CC0 1.0 / obs. 108447144

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 14 botanical countries

Native distribution of Solidago mexicana, 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
Alabama	ALA	NORTHERN AMERICA
Delaware	DEL
Florida	FLA
Georgia	GEO
Louisiana	LOU
Maryland	MRY
Mexico Gulf	MXG
Mexico Northeast	MXE
Mexico Southeast	MXT
Mississippi	MSI
North Carolina	NCA
South Carolina	SCA
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 305 in flower of 385 examined

69%

92%

80%

88%

71%

50%

57%

74%

90%

77%

76%

Proportion of examined Solidago mexicana in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	25	36	69%	53% to 82%
Feb	23	25	92%	75% to 98%
Mar	16	20	80%	58% to 92%
Apr	44	50	88%	76% to 94%
May	20	28	71%	53% to 85%
Jun	9	18	50%	29% to 71%
Jul	4	7	57%	25% to 84%
Aug	1	3	too few examined
Sep	14	19	74%	51% to 88%
Oct	76	84	90%	82% to 95%
Nov	47	61	77%	65% to 86%
Dec	26	34	76%	60% to 88%

Peak flowering in Feb. Each bar is the share of Solidago mexicana 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. 305 of 385 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. One month has fewer than 5 examined observations, so no proportion is drawn for it. 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.

Where it actually grows measured, from 1,646 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	7.0 °C	11.9 °C	16.6 °C
Warmest month, mean daily high	28.4 °C	30.3 °C	33.6 °C
Annual rainfall	706 mm	1,393 mm	1,702 mm
Rainfall in the driest quarter	110 mm	207 mm	344 mm

It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,646 research-grade observations of Solidago mexicana that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 5 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.

Aster mexicanus (L.) Kuntze
Solidago angustifolia Elliott
Solidago sempervirens subsp. mexicana (L.) Semple
Solidago sempervirens var. mexicana (L.) Fernald
Solidago stricta var. angustifolia (Elliott) A.Gray

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.
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.