Compilation
Kobresia sibirica

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Name

Identification
Kobresia arctica N.A.Ivanova [family CYPERACEAE ] Verified by Alf Erling Porsild, Kobresia hyperborea A.E.Porsild [family CYPERACEAE ] Verified by Alf Erling Porsild, Kobresia sibirica (Turcz. ex Ledeb.) Boeck. [family CYPERACEAE ] (stored under name); Verified by Shu-Ren Zhang,
Related name
  • Kobresia arctica
  • Kobresia macrocarpa
  • Kobresia sibirica
  • Kobresia hyperborea

Flora

Entry for Kobresia sibirica (Turczaninow ex Ledebour) Boeckeler [family CYPERACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 23,
Names
Kobresia sibirica (Turczaninow ex Ledebour) Boeckeler [family CYPERACEAE], Linnaea, 39: 7. 1875
Elyna sibirica Turczaninow ex Ledebour [family CYPERACEAE], Fl. Ross., 4: 262. 1852
Kobresia hyperborea A. E. Porsild [family CYPERACEAE]
Kobresia macrocarpa Clokey ex Mackenzie [family CYPERACEAE]
Treatment Author(s)
Peter W. Ball
Information
Culms 5–40 cm. Leaves: basal sheaths somewhat glossy, bladeless; blades filiform, 2–15 cm × 0.25–0.5 mm. Inflorescences 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. Scales brown, obovate-circular, 3.5–5.5 mm, midvein distinct only near base, margins hyaline, apex obtuse. Anthers 2–3 mm. Perigynia brown, finely veined, 3.5–5.5 mm, margins connate near base. Achenes 2.6–4 mm.
Phenology Fruiting
summer
jun
jul
aug
Altitude range
0–3600 m;
Distribution
cn Asia.USA AlaskaUSA Colo.USA Wyo.Canada N.W.T.Canada NunavutCanada Yukon
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.

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