Plate 1 figs. a–h · 8 separate observations
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 7 botanical countries
| Region | TDWG code | Continent |
|---|---|---|
| Arizona | ARI | NORTHERN AMERICA |
| Mexico Central | MXC | |
| Mexico Gulf | MXG | |
| Mexico Northeast | MXE | |
| Mexico Southwest | MXS | |
| New Mexico | NWM | |
| Texas | TEX |
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 64 observations
| Condition | 5th percentile | Median | 95th percentile |
|---|---|---|---|
| Coldest month, mean daily low | -2.1 °C | 4.3 °C | 7.0 °C |
| Warmest month, mean daily high | 24.7 °C | 27.7 °C | 34.2 °C |
| Annual rainfall | 313 mm | 430 mm | 536 mm |
| Rainfall in the driest quarter | 22 mm | 34 mm | 46 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 64 research-grade observations of Erioneuron avenaceum 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 28 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.
- Dasyochloa avenacea (Kunth) Steud.
- Dasyochloa longiglumis var. cabrerae Caro
- Erioneuron avenaceum var. cabrerae (Caro) E.A.Sánchez
- Erioneuron avenaceum var. grandiflorum (Vasey) Gould
- Erioneuron grandiflorum (Vasey) Tateoka
- Erioneuron nealleyi (Vasey) Tateoka
- Erioneuron nealleyi var. grandiflorum (Vasey) Beetle
- Koeleria avenacea (Kunth) Spreng.
- Sieglingia avenacea Kuntze
- Sieglingia avenacea var. grandiflora (Vasey) L.H.Dewey
- Sieglingia nealleyi (Vasey) L.H.Dewey
- Trichodiclida linearis Cerv.
- Tricuspis avenacea Griseb. ex E.Fourn.
- Tricuspis avenacea (Kunth) Thurb. ex A.Gray
- Tricuspis avenaceus (Kunth) Thurb. ex A.Gray
- Tricuspis nealleyi (Vasey) A.Heller
- Tridens avenaceus (Kunth) Hitchc.
- Tridens avenaceus var. avenaceus
- Tridens grandiflora (Vasey) Wooton & Standl.
- Tridens grandiflorus (Vasey) Wooton & Standl.
- Tridens nealleyi (Vasey) Wooton & Standl.
- Triodia avenacea Kunth
- Triodia avenacea var. avenacea
- Triodia avenacea var. breviaristata Kurtz
and 4 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.
- Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. 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.