|
|
|
|
|
|
|
|
|
|
|
| Cyperus strigosus L. | Species Image Gallery (opens in a new window) |
||||||||||||||||||||
| TAXONOMY | |||||||||||||||||||||
| Family: | Cyperaceae | ||||||||||||||||||||
| Genus: | Cyperus | ||||||||||||||||||||
| Species Synonyms: | Cyperus stenolepis Torr. Cyperus strigosus var. captilus Boeckl. Cyperus strigosus var. multiflorus Geise Cyperus strigosus var. robustior Britt. Cyperus strigosus var. stenolepis (Torr.) Kükenth. Cyperus hansenii Britt |
||||||||||||||||||||
| Common Names: | straw-coloured flatsedge strawcoloured nutgrass straw-coloured umbrella-sedge flatsedge nutgrass false nutsedge |
||||||||||||||||||||
| DISTRIBUTION | |||||||||||||||||||||
| Canada: | south-central Saskatchewan – southwestern Quebec | ||||||||||||||||||||
| Saskatchewan: | south-central Saskatchewan; Watrous | ||||||||||||||||||||
| Ecoregion: | Moist Mixed Grassland | ||||||||||||||||||||
| HABITAT | |||||||||||||||||||||
| Saskatchewan: | wet shores, damp forest, moist meadows, and swamps | ||||||||||||||||||||
| RARITY STATUS | |||||||||||||||||||||
| Provincial
Status According to Harms (2003): |
Endangered/Extirpated? |
||||||||||||||||||||
| Nature Conservancy Status: | G5 SH |
||||||||||||||||||||
| Saskatchewan
Species at Risk Status: |
None |
||||||||||||||||||||
| COSEWIC Status: | None |
||||||||||||||||||||
| Cyperus strigosus is endangered because it is extremely rare and may have been extirpated from Saskatchewan. This species is highly regionally restricted in the province. Immediate threats to this species have been identified. | |||||||||||||||||||||
| SPECIES DESCRIPTION | |||||||||||||||||||||
| Height: | 20 – 50 cm | ||||||||||||||||||||
| Roots: | rhizome hard, short, corm-like | ||||||||||||||||||||
| Stems:: | tufted, stout, solid, trigonous, glabrous or a few subapical prickles | ||||||||||||||||||||
| Leaves: | 20 – 40 cm long, 1 – 10 mm wide, flat, margin and midrib glabrous | ||||||||||||||||||||
| Inflorescence: | head compound, condensed to open, terminal, ovoid
to cylindrical, spikes 1 – 4; rays 3 – 6 cm long or absent; rachilla jointed at base, secondary rachillas occasionally present; bracts 2 – 6, ascending at 30 – 45°, exceeding inflorescence |
||||||||||||||||||||
| Spikelets: | 12 – 50 per spike, 5 – 10 mm long, linear-lanceolate, compressed; floral scales 3 – 11, 3 – 4.5 mm long, may be deciduous, stramineus to pale brown, midrib green, 3 – 4 ribbed laterally, 3-ribbed medially, overlapping | ||||||||||||||||||||
| Flowers: | perfect, perianth bristles absent, style 3-cleft | ||||||||||||||||||||
| Achenes: | 1.5 – 2 mm long, trigonous, narrowly oblong, puncticulate, purplish-brown | ||||||||||||||||||||
| |||||||||||||||||||||
