Gyrostemon australasicus

Plate 1 figs. a–h · 8 separate observations

Gyrostemon australasicus, photographed by Lorraine Phelan — fig. e Lorraine Phelan, CC BY 4.0 / obs. 74317257

Gyrostemon australasicus, photographed by Russell Best — fig. f Russell Best, CC BY 4.0 / obs. 75689374

Gyrostemon australasicus, photographed by Andrew Thornhill — fig. h Andrew Thornhill, CC BY 4.0 / obs. 53864560

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 Gyrostemon australasicus, 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
South Australia	SOA	AUSTRALASIA
Victoria	VIC

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 75 in flower of 103 examined

83%

50%

60%

100%

88%

73%

50%

Proportion of examined Gyrostemon australasicus in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	5	6	83%	44% to 97%
Feb	3	3	too few examined
Mar	4	4	too few examined
Apr	3	6	50%	19% to 81%
May	0	3	too few examined
Jun	0	5	0%	0% to 43%
Jul	6	10	60%	31% to 83%
Aug	13	13	100%	77% to 100%
Sep	11	11	100%	74% to 100%
Oct	15	17	88%	66% to 97%
Nov	8	11	73%	43% to 90%
Dec	7	14	50%	27% to 73%

Peak flowering in Aug. Each bar is the share of Gyrostemon australasicus 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. 75 of 103 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 4 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.

Cyclotheca australasica Moq.
Didymotheca pleiococca F.Muell.
Gyrostemon cyclotheca Benth.
Gyrostemon ramulosus Schltdl.

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.