Elymus hystrixL.

bottlebrush grass

WFO wfo-0000923555 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Elymus hystrix, photographed by Clay Gibbons
fig. a Clay Gibbons, CC BY 4.0 / 2022-06-13 / obs. 205885115
Elymus hystrix, photographed by Ryan Sorrells
fig. b Ryan Sorrells, CC BY 4.0 / obs. 205834718
Elymus hystrix, photographed by Michael J. Papay
fig. c Michael J. Papay, CC BY 4.0 / obs. 174932719
Elymus hystrix, photographed by mefisher
fig. d mefisher, CC0 1.0 / obs. 203041895
Elymus hystrix, photographed by Eric Schmidt
fig. e Eric Schmidt, CC BY 4.0 / obs. 174084786
Elymus hystrix, photographed by Troi Perkins
fig. f Troi Perkins, CC BY 4.0 / obs. 166894703
Elymus hystrix, photographed by ragbird
fig. g ragbird, CC0 1.0 / obs. 167640765
Elymus hystrix, photographed by Lynn Harper
fig. h Lynn Harper, CC0 1.0 / obs. 164611839

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.

Flowering n = 143 observations

Peak flowering in Jul, from 143 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 24 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.

  • Asperella americana Nutt.
  • Asperella angustifolia Nutt.
  • Asperella echidnea Raf.
  • Asperella hystrix (L.) Humb.
  • Asperella hystrix var. bigeloviana Fernald
  • Asprella americana Nutt.
  • Asprella angustifolia Nutt.
  • Asprella echidnea Raf.
  • Asprella hystrix (L.) Link
  • Asprella major Fresen.
  • Elymus hystrix f. bigelovianus (Fernald) Dore
  • Elymus hystrix var. bigelovianus (Fernald) Mohlenbr.
  • Elymus pseudohystrix Schult.
  • Gymnostichum hystrix (L.) Schreb.
  • Gymnostichum hystrix var. majus (Fres.) Eichler
  • Gymnostichum majus (Fresen.) Heynh.
  • Gymnostichum patulum (Moench) Lunell
  • Hystrix bigeloviana (Fernald) Carpenter
  • Hystrix elymoides Mack. & Bush
  • Hystrix hystrix (L.) Millsp.
  • Hystrix patula Moench
  • Hystrix patula f. bigeloviana (Fernald) Gleason
  • Hystrix patula var. bigeloviana (Fernald) Deam
  • Zeocriton hystrix (L.) P.Beauv.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.