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| Trichophorum pumilum (Vahl) Schinz & Thellung | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||||||||||||||
| Family: | Cyperaceae | ||||||||||||||||||||
| Genus: | Trichophorum | ||||||||||||||||||||
| Species Synonyms: | Trichophorum pumilum var. rollandii
(Fern.) Hultén Trichophorum pumilum ssp. rollandii (Fern.) Taylor & MacBryde Trichophorum rollandii (Fern.) Hultén Scirpus pumilus Vahl Scirpus pumilus var. rollandii (Fern.) Beetle Scirpus pumilus ssp. rollandii (Fern.) Raymond Baeothryon pumilum (Vahl) A. &D. Löve Scirpus rollandii Fern. |
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| Common Names: | dwarf bulrush Rolland’s bulrush |
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| DISTRIBUTION | |||||||||||||||||||||
| Canada: | Yukon Territory – southwestern Mackenzie District –northeastern British Columbia, southwestern and central Alberta – central Saskatchewan, eastern Quebec | ||||||||||||||||||||
| Saskatchewan: | central Saskatchewan; Saskatoon | ||||||||||||||||||||
| Ecoregion: | Moist Mixed Grassland | ||||||||||||||||||||
| HABITAT | |||||||||||||||||||||
| Saskatchewan: | calcareous ground-water, bog-like fens | ||||||||||||||||||||
| Associated Species: | Carex aurea, Lobelia kalmii, Muhlenbergia glomerata, Primula incana, Triglochin maritima | ||||||||||||||||||||
| RARITY STATUS | |||||||||||||||||||||
| Provincial
Status According to Harms (2003): |
Threatened |
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| Nature Conservancy Status: | G5T3 N2T2 S1 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Trichophorum pumilum is threatened in Saskatchewan because it is rare and highly regionally restricted in the province. Most local populations are small. | |||||||||||||||||||||
| SPECIES DESCRIPTION | |||||||||||||||||||||
| Height: | 5 – 14 cm | ||||||||||||||||||||
| Roots: | rhizome long, slender | ||||||||||||||||||||
| Stems: | loosely caespitose, dead leaves at base, terete, slender, smooth, grooved | ||||||||||||||||||||
| Leaves: | basal sheaths brown, persistent; leaves basal or sub-basal, 2 – 8.5 mm long, much shorter than culms, ~ 0.5 mm wide | ||||||||||||||||||||
| Inflorescence: | spikelet solitary, terminal; bracts 1, shorter than spikelet, apex mucronate | ||||||||||||||||||||
| Spikelets: | 3 – 6-flowered; 3 – 4.5 mm long; scales obtuse, brown | ||||||||||||||||||||
| Flowers: | perianth bristles absent; stamens 3; styles 3-cleft | ||||||||||||||||||||
| Fruits: | 1 – 2 mm long, obovoid, trigonous, smooth, scarcely beaked | ||||||||||||||||||||
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