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Nevada Bulrush

Amphiscirpus nevadensis (S. Watson) Oteng-Yeb.

Comments

provided by eFloras
Amphiscirpus nevadensis superficially resembles some dwarfed forms of Schoenoplectus pungens, with which it sometimes grows; S. pungens is readily distinguished by its trigonous culms and leaf blades, prominently 2-fid, awned scales, and beaked achenes. Amphiscirpus nevadensis differs from all North American species of Schoenoplectus in its wiry culms and leaves, prominently ciliate ligules, absence of evident internal aerenchyma, and beakless achenes. It has been reported from Delta, Manitoba.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 26, 28 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Description

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Rhizomes 1–4 mm diam., tough, hard. Culms ridged, 10–70 cm × 0.5–2 mm, hard, without evident internal air cavities. Leaves 5–10; sheaths loose, the proximal often disintegrating to prominent fibers, often stramineous or brownish, papery, fronts membranous-hyaline with delicate veins, summit slightly concave with V-shaped veinless area and often disintegrating; blades 0.5–1 times as long as culms, hard, without evident internal air cavities; distal blades 3–30 cm × 0.5–2 mm, longer than sheaths, margins sparsely antrorsely spinulose or papillose, apex sharply acute. Inflorescences: proximal involucral bract 1–15 cm, resembling foliage leaf blade. Spikelets ovoid to lanceoloid or terete, 5–20 × 3–5 mm; scales pale to dark red-brown, midribs usually stramineous, smooth; proximal 1 or 2 scales often resembling involucral bracts, with awnlike blades, to 15 mm; other scales in proximal part of spikelet prominently 9-veined, ovate, 4 × 3 mm, papery to often cartilaginous, margins hyaline, ciliolate, apex entire, acute to rounded. Flowers: perianth bristles pale brown, unequal. Achenes greenish to orange-brown, broadly obovoid, 2–2.3 × 1.5–1.7 mm.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 26, 28 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
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eFloras

Distribution

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Alta., B.C., Sask.; Calif., Colo., Mont., Nebr., Nev., N.Dak., Oreg., Utah, Wash., Wyo.; South America (Argentina, Chile).
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 26, 28 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Flowering/Fruiting

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Fruiting summer.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 26, 28 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Habitat

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Sunny, saline, often alkaline, seasonally wet places; 400–2400m.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 26, 28 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
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eFloras

Synonym

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Scirpus nevadensis S. Watson, Botany (Fortieth Parallel), 360. 1871
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 26, 28 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
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partner site
eFloras

Comprehensive Description

provided by North American Flora
Scirpus nevadensis S. Wats. Bot. King's Expl. 360. 1871
Scirpus remireoides Griseb. Abh. Ges. Wiss. Gott. 19: 267. 1874. Scirpus chubutensis Clarke, Kew Bull. Add. Ser. 8: 89. 1908.
Perennial; culms 0.5-4.5 dm. tall, stout, smooth, conspicuously grooved, trigonous, arising from a scaly rhizome to 7 mm. thick which grows 1-1.5 dm. below the ground; leaves numerous, stiff, ca. 1 mm. broad, pointed, often equaling but hardly exceeding the culm, the sheaths numerous, persistent, light brown; involucral bract 1-7 cm. long; scales walnut-brown, ovate; style bifid; bristles 1-3, much shorter than the achene; achene 2 mm. long, 1.25 mm. broad, broadly ovate, planoconvex, minutely reticulate.
Type locality: Soda Lake, Carson County, Nevada.
Distribution: Moist alkali spots in desert regions; British Columbia to Saskatchewan, south to Nebraska, Colorado, Wyoming, southern Nevada, and adjacent California; Argentina.
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cc-by-nc-sa-3.0
bibliographic citation
Alan Ackerman Beetle. 1947. (POALES); (CYPERACEAE); SCIRPEAE (PARS). North American flora. vol 18(8) New York Botanical Garden, New York, NY
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