Plate 1 figs. a–h · 5 observations
This species has been photographed under an open licence only 5 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.
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 8 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| Baleares | BAL | EUROPE |
| France | FRA | |
| Italy | ITA | |
| Portugal | POR | |
| Spain | SPA | |
| Algeria | ALG | AFRICA |
| Morocco | MOR | |
| Tunisia | TUN |
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.
Where it actually grows measured, from 57 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -2.8 °C | 1.6 °C | 8.4 °C |
| Warmest month, mean daily high | 24.3 °C | 27.5 °C | 30.7 °C |
| Annual rainfall | 504 mm | 763 mm | 1,146 mm |
| Rainfall in the driest quarter | 35 mm | 91 mm | 174 mm |
It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 57 research-grade observations of Helictochloa bromoides that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.
This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.
Also published as 30 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.
- Arrhenatherum bromoides (Gouan) Samp.
- Avena bromoides Gouan
- Avena bromoides f. flava H.Lindb.
- Avena bromoides subsp. gouanii St.-Yves
- Avena bromoides subsp. letourneuxii (Trab.) Trab.
- Avena bromoides var. dubia Maire
- Avena bromoides var. letourneuxii (Trab.) St.-Yves
- Avena bromoides var. microstachya Willk.
- Avena bromoides var. straminea Lange
- Avena elata Forssk.
- Avena letourneuxii Trab.
- Avena panormitana Lojac.
- Avena pratensis subsp. bromoides (Gouan) Ball
- Avena pratensis var. subspicata Link
- Avena pubescens var. bromoides (Gouan) Heynh.
- Avena truncata Dulac
- Avenastrum bromoides (Gouan) Vierh.
- Avenastrum pratense var. maximum Opiz
- Avenochloa bromoides (Gouan) Holub
- Avenochloa letourneuxii (Trab.) Holub
- Avenula bromoides (Gouan) H.Scholz
- Avenula bromoides subsp. pauneroae Romero Zarco
- Avenula bromoides var. straminea (Lange) O.Bolòs & Vigo
- Avenula letourneuxii (Trab.) H.Scholz
and 6 more.
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.