Kobresia simpliciuscula |
Kobresia sibirica |
|
---|---|---|
kobrésie simple, simple bog sedge, simple kobresia |
Siberian bog sedge, Siberian kobresia |
|
Culms | 5–35 cm. |
5–40 cm. |
Leaves | basal sheaths dull, base of blade usually persistent; blades ± channeled, 2–20 cm × 0.2–1.5(–2) mm. |
basal sheaths somewhat glossy, bladeless; blades filiform, 2–15 cm × 0.25–0.5 mm. |
Inflorescences | usually compound, (8–) 10–35 × (2–)3–8 mm; bracts brown, margins hyaline, ovate to oblong-ovate; proximal spikelets 1-flowered and pistillate or 2-flowered and androgynous; terminal and distal spikelets 1-flowered, staminate. |
simple, 10–20 × 4–8 mm; proximal spikelets usually androgynous with 1–2 staminate flowers, 1 pistillate flower, and 1–3 scales; distal spikelets staminate, 1-flowered. |
Perigynia | brown, 2.5–3.2 mm, margins free to base, smooth. |
brown, finely veined, 3.5–5.5 mm, margins connate near base. |
Achenes | 2–3 mm. |
2.6–4 mm. |
Scales | brown, ovate, 2–3 mm, margins hyaline, midvein distinct almost to tip, apex obtuse to subacute. |
brown, obovate-circular, 3.5–5.5 mm, midvein distinct only near base, margins hyaline, apex obtuse. |
Anthers | 1–2 mm. |
2–3 mm. |
2n | = 70–75. |
|
Kobresia simpliciuscula |
Kobresia sibirica |
|
Phenology | Fruiting summer. | Fruiting summer. |
Habitat | Fens, marshes, mesic to wet tundra, gravels, rocky slopes, usually on calcareous substrates | Dry to mesic tundra |
Elevation | 0–3500 m (0–11500 ft) | 0–3600 m (0–11800 ft) |
Distribution |
AK; CO; ID; OR; UT; WY; AB; BC; MB; NL; NT; NU; ON; QC; YT; Greenland; Eurasia
|
AK; CO; WY; NT; NU; YT; c Asia; n Asia |
Discussion | Kobresia sibirica, a local and variable species, is not yet fully understood. Some authors consider K. hyperborea and K. macrocarpa to be distinct endemic North American species; other authors include those and K. sibirica in the southwest Asian species K. schoenoides (C. A. Meyer) Steudel. In the Asian plants, the androgynous spikelets are reported as having 3 staminate flowers and no sterile scales. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 23, p. 252. | FNA vol. 23, p. 253. |
Parent taxa | Cyperaceae > Kobresia | Cyperaceae > Kobresia |
Sibling taxa | ||
Synonyms | Carex simpliciuscula | Elyna sibirica, K. hyperborea, K. macrocarpa |
Name authority | (Wahlenberg) Mackenzie: Bull. Torrey Bot. Club 50: 349. (1923) | (Turczaninow ex Ledebour) Boeckeler: Linnaea 39: 7. (1875) |
Web links |