|
|
|
|
|
|
|
|
|
|
|
| Trisetum wolfii Vasey | Species Image Gallery (opens in a new window) |
||||||||
| TAXONOMY | |||||||||
| Family: | Poaceae | ||||||||
| Genus: | Trisetum | ||||||||
| Species Synonyms: | none | ||||||||
| Common Names: | Wolf’s trisetum awnless trisetum beardless false-oat |
||||||||
| DISTRIBUTION | |||||||||
| Canada: | southern Alberta – southwestern Saskatchewan | ||||||||
| Saskatchewan: | Cypress Hills | ||||||||
| Ecoregion: | Cypress Upland | ||||||||
| HABITAT | |||||||||
| Saskatchewan: | moist, grassy ravines and sloughs | ||||||||
| Associated species: | Dewey sedge, fringed brome, hood sedge, purple avens | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Endangered |
||||||||
| Nature Conservancy Status: | G4 N1 S1 |
||||||||
| Saskatchewan
Species at Risk Status: |
None |
||||||||
| COSEWIC Status: | None |
||||||||
| Wolf’s trisetum 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, hairless or hairy below the nodes | ||||||||
| Leaves: | inserted mainly on the lower third of the stem, blades 5 – 15 cm long, 2 – 5 mm wide, flat, ascending, hairless to rough to long-hairy; sheaths hairless or sparsely long-hairy; ligules 2.5 – 4 mm long; ear-like lobes at the base of the leaf absent | ||||||||
| Inflorescence: | branched, 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; hardened thickening below lemma scantly hairy; lemmas 4 – 6.5 mm long, lance-shaped, tip entire, minute-awned or awnless; paleas shorter than lemmas | ||||||||
| Fruits: | grain hairy | ||||||||
| |||||||||
