Scirpus expansus Fernald (Q3373)

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Scirpus expansus is a taxon with the rank species within the genus Scirpus
Language Label Description Also known as
English
Scirpus expansus Fernald
Scirpus expansus is a taxon with the rank species within the genus Scirpus

    Statements

    taxon/id/Scirpus expansus Fernald
    0 references
    Scirpus expansus Fernald
    Scirpus expansus
    Fernald
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    scirpe étalé (French)
    woodland bulrush (English)
    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/
    rhizomes reddish, long, with conspicuous nodes and internodes.
    Culms: fertile ones upright or nearly so;
    Leaves 5–8 per culm;
    sheaths of proximal leaves red;
    proximal sheaths and blades with septa many, conspicuous;
    blades 30–68 cm × 9–23 mm.
    Inflorescences terminal;
    rays divaricate or occasionally ascending, proximal branches scabrellous (rarely smooth), distal branches scabrous, rays without axillary bulblets;
    bases of involucral-bracts green or reddish, not glutinous.
    Spikelets in dense clusters of (1–) 3–13 (–24), (largest cluster with 7 or more), spikelets sessile, ovoid or narrowly ovoid, 2–6 × 1–3 mm;
    scales black with green midribs, ovate or broadly rounded-ovate to nearly triangular or broadly triangular, 1–2.2 mm, apex rounded to mucronate, mucro (if present) to 0.2 mm.
    Flowers: perianth bristles brittle-based, readily detached from achene, 6, stout, straight or curved, shorter than to 1.5 times as long as achene, with retrorse, thick-walled, sharp-pointed teeth densely arranged almost to base, at maturity projecting beyond scales;
    Achenes pale-brown, oblongelliptic to broadly elliptic or obovate in outline, planoconvex or sometimes plumply trigonous, 1–1.6 × (0.6–) 0.8–1 mm. 2n = 64.