Datura quercifolia (Chinese thorn-apple)

Plate 1 figs. a–h · 8 separate observations

Datura quercifolia, photographed by Reid Hardin — fig. a Reid Hardin, CC BY 4.0 / 2022-02-13 / obs. 179772258

Datura quercifolia, photographed by Andrew Tree — fig. b Andrew Tree, CC BY 4.0 / obs. 175187654

Datura quercifolia, photographed by Cecelia Alexander — fig. c Cecelia Alexander, CC0 1.0 / obs. 162841887

Datura quercifolia, photographed by Craig Martin — fig. d Craig Martin, CC0 1.0 / obs. 156802316

Datura quercifolia, photographed by Martin Havran — fig. e Martin Havran, CC0 1.0 / obs. 154820014

Datura quercifolia, photographed by Dominic Gentilcore — fig. f Dominic Gentilcore, CC BY 4.0 / obs. 154801112

Datura quercifolia, photographed by Jesse Rorabaugh — fig. g Jesse Rorabaugh, CC0 1.0 / obs. 144524916

Datura quercifolia, photographed by Leticia Jiménez Hernández — fig. h Leticia Jiménez Hernández, CC BY-SA 4.0 / obs. 99366065

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.

Flowering 58 in flower of 100 examined

67%

80%

77%

80%

24%

Proportion of examined Datura quercifolia in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	2	too few examined
Feb	0	2	too few examined
Mar	0	0	too few examined
Apr	0	1	too few examined
May	0	0	too few examined
Jun	4	6	67%	30% to 90%
Jul	8	10	80%	49% to 94%
Aug	17	22	77%	57% to 90%
Sep	24	30	80%	63% to 91%
Oct	5	21	24%	11% to 45%
Nov	0	5	0%	0% to 43%
Dec	0	1	too few examined

Peak flowering in Jul. Each bar is the share of Datura quercifolia 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. 58 of 100 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.

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 DAQU. public domain. Retrieved 2026-07-13.

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. It has no native range either: Kew's checklist does not cover this taxon.