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| Trisetum spicatum (L.) Richter | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||
| Family: | Poaceae | ||||||||
| Genus: | Trisetum | ||||||||
| Species Synonyms: | Aira spicata L. Trisetum montanum Vasey Trisetum montanum var. shearii Louise-Marie Trisetum spicatum var. alaskanum (Nash) Malte ex Louise-Marie Trisetum spicatum ssp. alaskanum (Nash) Hultén Trisetum spicatum ssp. congdonii (Scribn. & Merr.) Hultén Trisetum spicatum var. congdonii (Scribn. & Merr.) A.S. Hitchc. Trisetum spicatum var. maidenii (Gandog.) Fern. Trisetum spicatum var. majus (Rydb.) Farw. Trisetum spicatum ssp. majus (Rydb.) Hultén Trisetum spicatum ssp. molle (Kunth) Hultén Trisetum spicatum var. molle (Kunth) Hultén Trisetum spicatum ssp. montanum (Vasey) W. Weber Trisetum spicatum var. pilosiglume Fern. Trisetum spicatum ssp. pilosiglume (Fern.) Hultén Trisetum spicatum var. spicatiforme Hultén Trisetum spicatum var. villosissimum (Lange) Louis-Marie Trisetum subspicatum (L.) Beauv. Trisetum triflorum (Bigelow) A.&D. Löve Trisetum triflorum ssp. molle (Kunth) A.&D. Löve Trisetum villosissimum (Lange) Louis-Marie |
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| Common Names: | spike trisetum narrow false-oat |
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| DISTRIBUTION | |||||||||
| Canada: | Yukon – Mackenzie – Arctic Islands – northern Ungava – Labrador, south to British Columbia – northern Alberta – northern Saskatchewan – central Manitoba – southern Ontario (Lake Superior, James Bay) – southern Quebec | ||||||||
| Saskatchewan: | northern Saskatchewan; Lake Athabasca – Cluff Lake – Hasbala Lake, Cypress Hills | ||||||||
| Ecoregion: | Cypress Upland, Athabasca Plain, Tazin Lake Upland, Selwyn Lake Upland | ||||||||
| HABITAT | |||||||||
| Saskatchewan: | dry, open, sand or gravel woods and clearings | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Vulnerable |
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| Nature Conservancy Status: | G2 S2 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Trisetum spicatum is vulnerable because it is rare or uncommon in Saskatchewan. It is usually locally numerous within limited areas. No threats are known or anticipated for this species at the present time. | |||||||||
| SPECIES DESCRIPTION | |||||||||
| Height: | 10 – 120 cm | ||||||||
| Roots: | roots fibrous | ||||||||
| Stems: | caespitose, erect, usually glabrous | ||||||||
| Leaves: | mostly basal or evenly distributed on stem, blades 10 – 20 cm long, 1 – 5 mm wide, flat to involute; sheaths pubescent or glabrous; ligules 1 – 4 mm long; auricles absent | ||||||||
| Inflorescence: | panicle 20 – 30 cm long, 1 – 2.5 cm wide, spicate top open, often interrupted basally, green to purplish to tawny | ||||||||
| Spikelets: | 5 – 7.5 mm long, 2 – 5-flowered, sessile to short-petiolate; rachilla hairy | ||||||||
| Florets: | glumes 3 – 7 mm long, subequal to equal, lanceolate, occasionally somewhat scabrous or pilose; callus pubescent; lemmas 3 – 7 mm long, lanceolate, glabrous to pilose, apex two-toothed, awned; awns 3 – 8 mm long, inserted on the back of the lemma, geniculate, twisted basally; palea nearly equal to lemmas, membranous | ||||||||
| Fruits: | caryopsis glabrous | ||||||||
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