Carex assiniboinensis W. Boott (Q231)

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Carex assiniboinensis is a taxon with the rank species within the section Carex sect. Hymenochlaenae
Language Label Description Also known as
English
Carex assiniboinensis W. Boott
Carex assiniboinensis is a taxon with the rank species within the section Carex sect. Hymenochlaenae

    Statements

    taxon/id/Carex assiniboinensis W. Boott
    0 references
    Carex assiniboinensis W. Boott
    Carex assiniboinensis
    W. Boott
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    Carex assiniboinensis
    carex de l'Assiniboine (French)
    carex d'Assiniboine (French)
    Assiniboia sedge (English)
    Assiniboine sedge (English)
    Assiniboia sedge (English)
    1 reference
    Harms, V.L. 2006. Annotated catalogue of Saskatchewan vascular plants. http://www.biodiversity.sk.ca/Docs/AnnotatedCatalogueSKVascPlants2006.pdf
    1 reference
    Newmaster, S.G. & S. Ragupathy. 2005. Flora Ontario - Integrated Botanical Information System (FOIBIS), Phase I. University of Guelph, Canada. http://www.uoguelph.ca/foibis http://www.uoguelph.ca/foibis/
    floodplain forests
    old river channels
    riverbanks
    mesic deciduous
    mixed conifer-hardwood forests
    thickets
    Plants densely cespitose, also producing long-arching stolons that root at the tip and form new plants.
    Culms dark maroon at base;
    flowering-stems 35–75 cm, longer than leaves at maturity, 0.5–0.8 mm thick, glabrous or minutely scabrous on angles, especially within inflorescence.
    Leaves: basal sheaths maroon, bladeless, glabrousl;
    blades flat, 1–3 mm wide, glabrous on adaxial surface, often strigose on abaxial surface, margins and midribs of abaxial surface scabrous at distal end.
    Inflorescences: peduncles of lateral spikess 20–60 mm, glabrous;
    peduncle of ternimal spike 40–60 mm, glabrous or minutely scabrous on angles;
    proximal bracts much shorter than inflorescence;
    sheaths 15–25 mm;
    blades 1.5–2.2 mm wide.
    Lateral spikes 2–5, pistillate with fewer than 10 perigynia attached 3–15 mm apart, 1 spike per node, well separated, erect or drooping, linear, 5–30 × 3–5 mm;
    distal spikes sometimes staminate and shorter than terminal spike.
    Terminal spike staminate, 11–30 × 1.5–3 mm.
    Pistillate scales pale hyaline, often partially suffused with chestnut-brown, with narrow green midrib, lanceolate to oblong, shorter than mature pergiynia, apex cuspidate or acuminate with serrulate green awn 1–3 mm, glabrous.
    Perigynia green, at least body maturing to yellow, 2-ribbed but not obviously otherwise veined, except sometimes near base, tightly enveloping achene, lanceellipsoid, 5–6.5 × 0.8–1.8 mm, cartilaginous, base with stipe 0.5 mm, apex tapering gradually to beak, short-pubescent;
    beak oblique to minutely toothed, 2.5 mm.
    Achenes stipitate, 1.8–2.5 × 0.7–1 mm, stipe adnate to thickened perigynium base, breaking from achene at maturity.