Cyperus eragrostis Lamarck in J. Lamarck and J. Poiret (Q3261)
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Cyperus eragrostis is a taxon with the rank species within the subgenus Cyperus subg. Pycnostachys
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English |
Cyperus eragrostis Lamarck in J. Lamarck and J. Poiret
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Cyperus eragrostis is a taxon with the rank species within the subgenus Cyperus subg. Pycnostachys
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Statements
taxon/id/Cyperus eragrostis Lamarck
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Cyperus eragrostis Lamarck
Cyperus eragrostis
Lamarck
FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
accepted
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CA-BC
present
introduced
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CA-BC
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US-AL
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US-CA
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US-LA
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US-MS
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US-NJ
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US-OR
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US-PA
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US-SC
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US-TX
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US-WA
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Herbs, perennial, cespitose, rhizomatous.
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Culms trigonous to terete, (25–) 40–60 (–90) cm, glabrous.
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Leaves flat or V-shaped, (10–) 25–50 cm × 5–8 (–12) mm.
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Inflorescences: heads globose, (10–) 20–40 mm diam.;
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rays (0–) 3–10, 2.5–5 (–12) cm;
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2d order rays usually absent (when present, 0.5–1.5 cm);
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bracts 4–8, horizontal to ascending at 15–30°, flat (or V-shaped), 3–30 (–50) cm × 1.5–8 (–12) mm.
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Spikelets (20–) 30–50 (–70), oblong, compressed, 5–20 × 2.2–3 mm;
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floral scales (12–) 20–30 (–50), off-white to golden brown, basally 2-keeled, laterally ribless, ovate-deltate, 2–2.3 × 1–1.4 mm (declined 30–40º from rachilla).
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Flowers: stamen 1;
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anthers 1–1.2 mm;
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styles 1–1.2 mm;
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Achenes black or dark-brown, stipitate, broadly ellipsoid, 1.2–1.4 × 0.5–0.6 mm, stipe to 0.1 mm, apex apiculate, beak 0.2–0.3 mm, surfaces puncticulate.
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