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| Trisetum wolfii Vasey | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||
| Family: | Poaceae | ||||||||
| Genus: | Trisetum | ||||||||
| Species Synonyms: | none | ||||||||
| Common Names: | Wolf’s trisetum awnless trisetum beardless false-oat |
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| DISTRIBUTION | |||||||||
| Canada: | southern Alberta – southwestern Saskatchewan | ||||||||
| Saskatchewan: | Cypress Hills | ||||||||
| Ecoregion: | Cypress Upland | ||||||||
| HABITAT | |||||||||
| Saskatchewan: | moist, grassy ravines and sloughs | ||||||||
| Associated species: | Bromus ciliatus, Carex deweyana, Carex hoodii, Geum rivale | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Endangered |
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| Nature Conservancy Status: | G4 N1 S1 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Trisetum wolfii is endangered because of extreme rarity in Saskatchewan. It is regionally restricted in the province and is almost always locally sparse. Possible threats have been identified for this species. | |||||||||
| SPECIES DESCRIPTION | |||||||||
| Height: | 20 – 100 cm | ||||||||
| Roots: | roots fibrous; rhizomes short | ||||||||
| Stems: | erect, glabrous or pubescent below the nodes | ||||||||
| Leaves: | inserted mainly on the lower third of the stem, blades 5 – 15 cm long, 2 – 5 mm wide, flat, ascending, glabrous to scabrous to pilose; sheaths glabrous or sparsely pilose; ligules 2.5 – 4 mm long; auricles absent | ||||||||
| Inflorescence: | panicle 10 – 30 cm long, 1 – 1.5 cm wide, erect, dense, green tawny or purplish | ||||||||
| Spikelets: | 4 – 7 mm long, subsessile, 2-flowered | ||||||||
| Florets: | glumes subequal, 4 – 7 mm long, usually longer than the lowest florets; callus scantly pubescent; lemmas 4 – 6.5 mm long, lanceolate, apex entire, minute-awned or awnless; paleas shorter than lemmas | ||||||||
| Fruits: | caryopsis pubescent | ||||||||
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