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| Cyperus squarrosus L. | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||||||||||||||
| Family: | Cyperaceae | ||||||||||||||||||||
| Genus: | Cyperus | ||||||||||||||||||||
| Species Synonyms: | Cyperus inflexus Muhl. Cyperus aristatus Rottb. Cyperus aristatus var. runyonii O’Neill Cyperus squarrosus var. runyonii (O’Neill) S.D. Jones & J. Wipff |
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| Common Names: | awned flatsedge bearded flatsedge bearded nutgrass awned umbrella-sedge bearded umbrella-sedge flat sedge nut-grass |
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| DISTRIBUTION | |||||||||||||||||||||
| Canada: | southern British Columbia – southern Alberta – Saskatchewan – southeastern Manitoba – Ontario – western New Brunswick | ||||||||||||||||||||
| Saskatchewan: | southern to central Saskatchewan; Mortlach – Saskatoon | ||||||||||||||||||||
| Ecoregion: | Mixed Grassland, Moist Mixed Grassland, Mid-Boreal Lowland | ||||||||||||||||||||
| HABITAT | |||||||||||||||||||||
| Saskatchewan: | moist to drying mud flats, sloughs and potholes | ||||||||||||||||||||
| Associated Species: | Rorippa islandica | ||||||||||||||||||||
| RARITY STATUS | |||||||||||||||||||||
| Provincial
Status According to Harms (2003): |
Threatened |
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| Nature Conservancy Status: | G5 S1 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Cyperus squarrosus is threatened in Saskatchewan because it is rare. This species occurs in a relatively large range in the province, but local population sizes vary. | |||||||||||||||||||||
| SPECIES DESCRIPTION | |||||||||||||||||||||
| Height: | 20 – 40 cm | ||||||||||||||||||||
| Roots: | rhizome, corm-like thickenings present | ||||||||||||||||||||
| Culms: | perennial, 1 – 2 mm wide, trigonous, glabrous or with a few subapical prickle | ||||||||||||||||||||
| Leaves: | 20 – 40 cm long, flat, margin glabrous or scabrous | ||||||||||||||||||||
| Inflorescence: | spikes 1 – 4, 1 – 2.8 cm long, ovoid to oblong; rays sometimes absent, usually 3 – 6 cm long; bracts 5 – 7, ascending at 30° to 45°, 10 – 30 cm long | ||||||||||||||||||||
| Spikelets: | 12 – 50 per spike, 5 – 30 mm long, linear, compressed; floral scales deciduous, appressed, stramineus to pale brown, midrib green | ||||||||||||||||||||
| Flowers: | stamens 1; styles 1 - 2 mm long, stigma 3-cleft, 3 – 4 mm long | ||||||||||||||||||||
| Achenes: | narrowly oblong, trigonous, puncticulate, purplish-brown | ||||||||||||||||||||
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