Poaceae
Mammoth wildrye
Leymus racemosus
- Family
- Poaceae
- Genus
- Leymus
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Common names
By language (5)
- Chinese
- 大賴草, 大赖草
- English
- Mammoth wildrye
- Kazakh
- Айғыр қияқ
- Mongolian
- Цагаан суль
- Russian
- Волоснец кистистый
Synonyms
- Elymus arenarius S.G.Gmel.
- Elymus arenarius subsp. sabulosus (M.Bieb.) Beldie
- Elymus arenarius var. giganteus (Vahl) Schmalh.
- Elymus arenarius var. sabulosus (M.Bieb.) Trevir.
- Elymus attenuatus (Griseb.) K.Richt.
- Elymus giganteus Vahl
- Elymus giganteus f. attenuatus Griseb.
- Elymus giganteus f. crassinervius Karav. & Kir.
- Elymus giganteus f. pruinosus Roshev.
- Elymus giganteus var. alterniflorus Regel
- Elymus giganteus var. attenuatus Griseb.
- Elymus giganteus var. crassinervius Kar. & Kir.
- Elymus giganteus var. cylindraceus Roshev.
- Elymus giganteus var. sabulosus (M.Bieb.) Hack.
- Elymus macrostachys Spreng.
- Elymus mexicanus Cav.
- Elymus racemosus Lam.
- Elymus racemosus var. sabulosus (M.Bieb.) Bowden
- Elymus sabulosus M.Bieb.
- Elymus sabulosus var. depauperatus Bornm.
- Hordeum giganteum (Vahl) Raspail
- Leymus crassinervius (Kar. & Kir.) Baikov & Lipin
- Leymus giganteus (Vahl) Pilg.
- Leymus klokovii (Tzvelev) Baikov & Lipin
- Leymus racemosus subsp. crassinervius (Kar. & Kir.) Tzvelev
- Leymus racemosus subsp. depauperatus (Bornm.) Soják
- Leymus racemosus subsp. klokovii Tzvelev
- Leymus racemosus subsp. sabulosus (M.Bieb.) Tzvelev
- Leymus racemosus var. crassinervius (Kar. & Kir.) C.Yen & J.L.Yang
- Leymus racemosus var. cylindraceus (Roshev.) C.Yen & J.L.Yang
- Leymus racemosus var. sabulosus (M.Bieb.) C.Yen & J.L.Yang
- Leymus sabulosus (M.Bieb.) Tzvelev
- Triticum sabulosum (M.Bieb.) F.Herm.
Flowers
- Flower colour
- yellow (USDA PLANTS Database)
Characteristics
- Growth habit
- Graminoid
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: introduced
Photos
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0, from Wikimedia Commons 
Photo: 阿橋 HQ, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Sergey Cherkasov, CC BY 4.0, from Wikimedia Commons
More in Leymus
- Sand ryegrassLeymus arenariusPoaceae
- American dunegrassLeymus mollisPoaceae
- Altai wildryeLeymus angustusPoaceae
- False wheatgrassLeymus chinensisPoaceae
- Manystem wildryeLeymus multicaulisPoaceae
- Leymus paboanusPoaceae
- Downy ryegrassLeymus innovatusPoaceae
- Leymus akmolinensisPoaceae
- Colorado wildryeLeymus ambiguusPoaceae
- Basin wildryeLeymus cinereusPoaceae
- Giant wildryeLeymus condensatusPoaceae
- Beardless wildryeLeymus triticoidesPoaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.