Calamagrostis villosa(Chaix) J.F.Gmel.

WFO wfo-0000858176 Accepted WFO 2026-06 8 photographs CC BY

Plate 1 figs. a–h · 8 separate observations

Calamagrostis villosa, photographed by Vladimír Fuka
fig. a Vladimír Fuka, CC BY 4.0 / 2021-11-06 / obs. 167597639
Calamagrostis villosa, photographed by Vladimír Fuka
fig. b Vladimír Fuka, CC BY 4.0 / obs. 157928603
Calamagrostis villosa, photographed by Vladimír Fuka
fig. c Vladimír Fuka, CC BY 4.0 / obs. 151860832
Calamagrostis villosa, photographed by Vladimír Fuka
fig. d Vladimír Fuka, CC BY 4.0 / obs. 151638338
Calamagrostis villosa, photographed by Vladimír Fuka
fig. e Vladimír Fuka, CC BY 4.0 / obs. 151643331
Calamagrostis villosa, photographed by Vladimír Fuka
fig. f Vladimír Fuka, CC BY 4.0 / obs. 151643919
Calamagrostis villosa, photographed by Vladimír Fuka
fig. g Vladimír Fuka, CC BY 4.0 / obs. 146404542
Calamagrostis villosa, photographed by Vladimír Fuka
fig. h Vladimír Fuka, CC BY 4.0 / obs. 204955251

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.

The specimen a real sheet, in a real collection

Herbarium
The New York Botanical Garden
Accession
04310588
Filed as
Calamagrostis villosa (Chaix) J.F.Gmel.
Det. by
not recorded on this sheet
Collected
not recorded
Origin
not recorded
The sheet
View the digitised specimen (CC BY 4.0)

A real pressed plant, in a real collection, under the accession number above. Not an illustration of one. The holding institution does not serve this sheet’s image to third parties, so there is no photograph here. The record is real and the link goes to it. Where we hold no openly licensed sheet for a species this section is simply absent, and where a sheet never recorded who determined it, that field stays empty rather than being filled in. Roughly half of all herbarium sheets never recorded a determiner, which is ordinary.

Native range 12 botanical countries

Regions where Calamagrostis villosa is native: Austria, Bulgaria, Czechia-Slovakia, France, Germany, Hungary, Italy, NW. Balkan Pen., Poland, Romania, Switzerland, Ukraine AustriaBulgariaCzechia-SlovakiaFranceGermanyHungaryItalyNW. Balkan Pen.PolandRomaniaSwitzerlandUkraine
Native distribution of Calamagrostis villosa, 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.
RegionTDWG codeContinent
Austria AUT EUROPE
Bulgaria BUL
Czechia-Slovakia CZE
France FRA
Germany GER
Hungary HUN
Italy ITA
NW. Balkan Pen. YUG
Poland POL
Romania ROM
Switzerland SWI
Ukraine UKR

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 110 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -14.8 °C -6.1 °C -4.5 °C
Warmest month, mean daily high 14.6 °C 19.6 °C 21.6 °C
Annual rainfall 607 mm 950 mm 1,766 mm
Rainfall in the driest quarter 104 mm 185 mm 300 mm

It is found where winters bring hard 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 110 research-grade observations of Calamagrostis villosa 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 43 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.

  • Agrostis pilosa var. aristata Gaudin
  • Agrostis spuria Roem. & Schult.
  • Agrostis villosa Chaix
  • Arundo alpina Honck.
  • Arundo alpina Vill. ex Kunth
  • Arundo calamagrostis Haller f.
  • Arundo calamagrostis var. halleriana (Gaudin) G.Mey.
  • Arundo halleriana Gaudin
  • Calamagrostis alpina Host
  • Calamagrostis alpina var. aristata Schur
  • Calamagrostis alpina var. extrema Beck
  • Calamagrostis densiflora Müll.Berol.
  • Calamagrostis glaucescens Müll.Berol.
  • Calamagrostis halleriana (Gaudin) P.Beauv.
  • Calamagrostis halleriana var. ambigua Hartm.
  • Calamagrostis halleriana var. densiflora (Blytt) Müll.Berol.
  • Calamagrostis halleriana var. glabrata Čelak.
  • Calamagrostis halleriana var. minutivalvis Torges
  • Calamagrostis halleriana var. nutans (Saut. ex Rchb.) Griseb.
  • Calamagrostis halleriana var. pilosa Čelak.
  • Calamagrostis latifolia var. densiflora Blytt
  • Calamagrostis nutans Saut. ex Rchb.
  • Calamagrostis pseudophragmites var. densiflora (Blytt) Blytt
  • Calamagrostis silvatica var. villosa (Chaix) Steud.

and 19 more.

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.
  3. 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.