Eleocharis quadrangulata (Michaux) Roemer & Schultes in J. J. Roemer et al. (Q3326)

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Eleocharis quadrangulata is a taxon with the rank species within the subgenus Eleocharis subg. Limnochloa
Language Label Description Also known as
English
Eleocharis quadrangulata (Michaux) Roemer & Schultes in J. J. Roemer et al.
Eleocharis quadrangulata is a taxon with the rank species within the subgenus Eleocharis subg. Limnochloa

    Statements

    taxon/id/Eleocharis quadrangulata (Michaux) Roemer & Schultes
    0 references
    Eleocharis quadrangulata (Michaux) Roemer & Schultes
    Eleocharis quadrangulata
    (Michaux) Roemer & Schultes
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    Eleocharis quadrangulata
    (Michaux) Roemer & Schultes
    éléocharide à tige carrée (French)
    square-stemmed spikerush (English)
    angled spikerush (English)
    four-angled spikerush (English)
    Square-stemmed spike-rush (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/
    s to c Mexico
    shallow water
    fresh lake
    pond shores
    marshes
    rhizomes 1.5–4 mm thick, soft to hard, longer internodes 3–8 cm, scales 5–10 mm, tubers absent.
    Culms acutely quadrangular, (30–) 45–105 cm × (1–) 2–5.4 mm, soft to firm, internally spongy, transverse septa incomplete;
    plants never forming filiform, flaccid culms.
    Leaves: distal leaf-sheaths persistent, membranous, apex narrowly acute to acuminate, sometimes prolonged into a bladelike portion to 8 cm.
    Spikelets not proliferous, (15–) 20–76 × 3–5 (–6) mm;
    proximal scale empty, amplexicaulous, (1–) 2.2–5.4 mm;
    floral scales (28–) 45–135, 2–3 per mm of rachilla, stramineous to pale-brown, usually with pale to dark-brown submarginal band, midrib region sometimes greenish, broadly obovate to ovate, (4–) 4.5–6.2 × 2.8–5 mm, subcartilaginous, apex rounded to obtuse.
    Flowers: perianth bristles 6–7, whitish to brown, slender, often markedly unequal, shorter than achene or some equalling tubercle, sparsely retrorsely spinulose to smooth;
    anthers stramineous to redbrown, 2.3–2.9 mm;
    styles 3-fid, sometimes 2-fid.
    Achenes yellow or pale green to brown or purplish, biconvex, obovoid to obpyriform, 1.8–3 × 1.3–2 mm, almost smooth to markedly sculptured at 10–15X, each face with 19–38 rows of almost linear, transversely elongated cells, which sometimes isodiametric at achene base, apex often constricted to neck 0.3–0.4 mm wide.
    Tubercles dark-brown or whitish, deltoid to high-pyramidal or lanceoloid, 0.7–1.5 × 0.4–1 mm, often spongy.