Pomax umbellata

Plate 1 figs. a–h · 8 separate observations

Pomax umbellata, photographed by Peter Crowcroft — fig. c Peter Crowcroft, CC BY 4.0 / obs. 195235674

Pomax umbellata, photographed by Elijah Magistrado — fig. e Elijah Magistrado, CC BY 4.0 / obs. 188450007

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 5 botanical countries

Native distribution of Pomax umbellata, 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
New South Wales	NSW	AUSTRALASIA
Northern Territory	NTA
Queensland	QLD
South Australia	SOA
Western Australia	WAU

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 94 in flower of 228 examined

47%

40%

50%

33%

18%

30%

42%

44%

61%

46%

31%

Proportion of examined Pomax umbellata in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	7	15	47%	25% to 70%
Feb	4	10	40%	17% to 69%
Mar	5	10	50%	24% to 76%
Apr	7	21	33%	17% to 55%
May	7	21	33%	17% to 55%
Jun	2	11	18%	5% to 48%
Jul	3	10	30%	11% to 60%
Aug	10	24	42%	24% to 61%
Sep	17	39	44%	29% to 59%
Oct	14	23	61%	41% to 78%
Nov	13	28	46%	30% to 64%
Dec	5	16	31%	14% to 56%

Peak flowering in Oct. Each bar is the share of Pomax umbellata 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. 94 of 228 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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 11 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.

Opercularia banksiana Schult. & Schult.f.
Opercularia lamarckiana Schult. & Schult.f.
Opercularia umbellata Gaertn.
Pomax glabra DC.
Pomax hirta DC.
Pomax rupestris F.Muell.
Pomax umbellata var. carnosula Domin
Pomax umbellata var. glabra (DC.) Domin
Pomax umbellata var. hirta (DC.) Domin
Pomax umbellata var. mitchelliana Domin
Pomax umbellata var. ovatifolia Domin

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.