Cyperus flavescens Linnaeus (Q3266)
Cyperus flavescens is a taxon with the rank species within the subgenus Cyperus subg. Pycreus
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English |
Cyperus flavescens Linnaeus
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Cyperus flavescens is a taxon with the rank species within the subgenus Cyperus subg. Pycreus
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Statements
taxon/id/Cyperus flavescens Linnaeus
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Cyperus flavescens Linnaeus
Cyperus flavescens
Linnaeus
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-ON
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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/
CA-ON
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US-AL
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US-AR
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US-CA
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US-DE
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US-DC
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US-FL
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US-GA
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US-IL
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US-IN
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US-KS
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US-KY
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US-LA
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US-MD
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US-MA
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US-MI
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US-MS
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US-MO
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US-NJ
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US-NY
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US-NC
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US-OH
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US-OK
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US-PA
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US-SC
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US-TX
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Herbs, annual, cespitose.
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Culms trigonous, (2–) 4–30 cm × 0.4–2 mm, glabrous.
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Leaves 1–5, (blades often absent, base of culm with 1 reddish sheath bearing minute blade tooth 1–2 mm), (3–) 10–18 cm × (0.5–) 1.5–2 (–2.6) mm.
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Inflorescences: spikes 1–3, ovoid or ± digitate, 10–30 × 8–26 mm;
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rays 1–4 (–6), 0.5–3 (–9) cm;
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bracts 2–3, approximately horizontal, 1–12 cm × 0.5–2.5 mm.
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Spikelets 1–6, compressed, oblong-lanceoloid, 5–15 × (2–) 2.3–2.8 mm;
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floral scales (4–) 8–24, closely imbricate, laterally yellow to yellowish-brown, margins light-brown to clear, medially green, laterally ribless, medially 2–3-ribbed, 2-keeled basally, ovate, (1.5–) 1.8–2.2 × 1.8 mm, apex obtuse.
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Flowers: stamens 3;
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anthers 0.4 mm, connectives not prolonged;
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stigmas 0.5–0.8 mm.
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Achenes jet black to reddish-brown, slightly stipitate, obovoid, 1–1.2 × 0.8 mm, apex apiculate, surface with network of rectangular longitudinally elongate cells and transverse undulations.
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