Bromus cebadilla (roadside brome)

Plate 1 figs. a–h · 8 separate observations

Bromus cebadilla, photographed by Leon Perrie — fig. a Leon Perrie, CC BY 4.0 / 2021-11-14 / obs. 168765852

Bromus cebadilla, photographed by Rob Cuthrell — fig. c Rob Cuthrell, CC0 1.0 / obs. 203746513

Bromus cebadilla, photographed by Thomas Mesaglio — fig. e Thomas Mesaglio, CC BY 4.0 / obs. 165463277

Bromus cebadilla, photographed by Joe Potter Butler — fig. f Joe Potter Butler, CC BY 4.0 / obs. 109828048

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 Bromus cebadilla, 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
Argentina South	AGS	SOUTHERN AMERICA
Chile Central	CLC
Chile North	CLN
Chile South	CLS
Juan Fernández Is.	JNF

Not drawn on the map: Juan Fernández Is.. We hold no public-domain boundary for this region, so it is listed rather than guessed at.

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 30 in flower of 56 examined

33%

71%

73%

56%

Proportion of examined Bromus cebadilla in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	4	4	too few examined
Feb	0	4	too few examined
Mar	1	3	too few examined
Apr	3	9	33%	12% to 65%
May	0	0	too few examined
Jun	0	3	too few examined
Jul	0	0	too few examined
Aug	0	0	too few examined
Sep	5	7	71%	36% to 92%
Oct	11	15	73%	48% to 89%
Nov	5	9	56%	27% to 81%
Dec	1	2	too few examined

Peak flowering in Oct. Each bar is the share of Bromus cebadilla 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. 30 of 56 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 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 8 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.

Bromus catharticus subsp. stamineus (É.Desv.) A.N.Massa
Bromus catharticus var. elatus (É.Desv.) Planchuelo
Bromus stamineus É.Desv.
Bromus unioloides f. elatus (É.Desv.) Kloos
Bromus unioloides var. elatus É.Desv.
Bromus valdivianus Phil.
Ceratochloa staminea (É.Desv.) Stace
Ceratochloa valdiviana (Phil.) Holub

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 BRST3. 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.