Deinandra paniculata (San Diego tarweed)

Plate 1 figs. a–h · 8 separate observations

Deinandra paniculata, photographed by Madeleine Claire — fig. a Madeleine Claire, CC BY 4.0 / 2022-06-04 / obs. 203602074

Deinandra paniculata, photographed by Millie Basden — fig. d Millie Basden, CC BY 4.0 / obs. 146667607

Deinandra paniculata, photographed by Amy — fig. e Amy, CC BY 4.0 / obs. 130785101

Deinandra paniculata, photographed by Shawn O'Donnell — fig. g Shawn O'Donnell, CC BY 4.0 / obs. 82826410

Deinandra paniculata, photographed by Amthinkia — fig. h Amthinkia, CC0 1.0 / obs. 74502295

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 2 botanical countries

Native distribution of Deinandra paniculata, 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
California	CAL	NORTHERN AMERICA
Mexico Northwest	MXN

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 178 in flower of 182 examined

60%

96%

100%

Proportion of examined Deinandra paniculata in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	2	2	too few examined
Feb	0	0	too few examined
Mar	0	0	too few examined
Apr	3	5	60%	23% to 88%
May	24	25	96%	80% to 99%
Jun	22	23	96%	79% to 99%
Jul	11	11	100%	74% to 100%
Aug	19	19	100%	83% to 100%
Sep	51	51	100%	93% to 100%
Oct	19	19	100%	83% to 100%
Nov	20	20	100%	84% to 100%
Dec	7	7	100%	65% to 100%

Peak flowering in Jul. Each bar is the share of Deinandra paniculata 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. 178 of 182 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 3 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 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.

Deinandra increscens subsp. foliosa (Hoover) B.G.Baldwin
Hemizonia increscens subsp. foliosa (Hoover) Tanowitz
Hemizonia paniculata A.Gray
Hemizonia paniculata subsp. foliosa Hoover
Hemizonia paniculata subsp. paniculata

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 HEPA6. 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.