Carex formosa Dewey (Q237)
Carex formosa is a taxon with the rank species within the section Carex sect. Hymenochlaenae
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Carex formosa Dewey
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Carex formosa is a taxon with the rank species within the section Carex sect. Hymenochlaenae
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Statements
taxon/id/Carex formosa Dewey
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Carex formosa Dewey
Carex formosa
Dewey
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-QC
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Marie-Victorin, Fr. 1995. Flore laurentienne. 3e éd. Mise à jour et annotée par L. Brouillet, S.G. Hay, I. Goulet, M. Blondeau, J. Cayouette et J. Labrecque. Gaétan Morin éditeur. 1093 pp.
CA-ON
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CA-QC
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US-CT
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US-IA
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Plants densely cespitose.
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Culms dark maroon at base;
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flowering-stems 0.5–1 mm thick, 30–80 cm, longer than leaves at maturity, glabrous but scabrous on angles within inflorescence.
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Leaves: basal sheaths maroon, bladeless, pubescent, sometimes glabrous, others grading from marooon to green on back, white-hyaline, red dotted, and pilose on front;
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blades flat, 3–7 mm wide, glabrous on adaxial surface, pilose on abaxial surface and margins.
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peduncles of lateral spikes slender, to 10 cm, usually much longer than spikes, pubescent;
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of terminal spikes 25–50 mm, pubescent;
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proximal bracts nearly equaling but usually not exceeding inflorescences;
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blades 2.5–4.5 mm wide.
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Lateral spikes 2–4, 1 per node, well separated, drooping at maturity, pistillate except for 1 or 2 basal staminate flowers in each, with 8–25 perigynia per spike attached 1 mm apart, cylindric, 15–25 × 4–6 mm.
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Terminal spike gynecandrous, 15–30 × 5–6 mm in distal pistillate portion, 1.5–2 mm wide in proximal staminate portion.
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Pistillate scales pale hyaline tinged with chestnut-brown, broad green midrib red dotted, ovate, shorter than mature perigynia, apex acute to cuspidate, awn less than 1 mm, glabrous.
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Perigynia green, copiously red dotted, 2-ribbed with 7–12 fine veins on each face, loosely enveloping achene, ovoid-ellipsoid, 3.5–5 × 1.7–2 mm, membranous, base with short stipe, apex narrowing to abrupt beak, glabrous;
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beak minutely bidentate, less than 0.5 mm.
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Achenes substipitate, 2–2.5 × 1.4–1.5 mm.
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tinged with chestnut-brown
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