Difference between revisions of "Eleocharis compressa Sullivant (Q3286)"
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Latest revision as of 12:37, 24 June 2022
Eleocharis compressa is a taxon with the rank species within the series Eleocharis ser. Eleocharis
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Eleocharis compressa Sullivant
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Eleocharis compressa is a taxon with the rank species within the series Eleocharis ser. Eleocharis
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Statements
taxon/id/Eleocharis compressa Sullivant
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Eleocharis compressa Sullivant
Eleocharis compressa
Sullivant
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
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CA-MB
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CA-ON
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CA-QC
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CA-SK
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US-AL
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US-AR
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US-CO
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US-DC
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US-IL
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US-IN
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US-IA
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US-KS
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US-KY
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US-MD
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US-MI
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US-MN
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US-MS
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US-MO
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US-ND
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US-NM
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US-NY
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US-NE
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US-OH
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US-OK
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US-PA
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US-SD
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US-TN
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US-TX
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US-VA
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US-WV
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US-WI
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Plants perennial, mat-forming;
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rhizomes evident, short to rather long, 2–3 mm thick, firm, cortex persistent, internodes very short to 2 mm, scales often decaying to coarse fibers, 5–12 mm, papery.
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Culms subterete to greatly compressed, to 5 times as wide as thick, often with 2–12 ridges, 8–45 cm × (0.2–) 0.5–1.8 mm, firm to hard, spongy.
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Leaves: distal leaf-sheaths persistent, not splitting, proximally red, distally green to stramineous, papery, apex usually redbrown, broadly obtuse to subtruncate, callose, tooth absent.
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Spikelets ovoid, 4–8 × 2–4 mm, apex acute;
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proximal scale clasping 3/4 of culm to amplexicaulous, entire;
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subproximal scale empty or with flower;
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floral scales spreading in fruit, 20–60, 6 per mm of rachilla, medium brown to very dark-brown, sometimes stramineous or colorless, midrib region often paler, ovate, 2–3 (–4) × 1–1.5 mm, apex acute to acuminate, the apical colorless hyaline region mostly longer than wide and 0.6–1.2 mm, in proximal part of spikelet 2-fid to shallowly cut, rarely entire, in distal part often entire, carinate in distal part of spikelet.
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Flowers: perianth bristles 0–5, stramineous, length variable, to equaling achene, obscurely to clearly retrorsely spinulose;
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anthers yellow to orangebrown, 0.7–2 mm;
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styles 3-fid or some 2-fid.
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Achenes falling with scales or some persistent, yellowbrown or dark-brown, obovoid to obpyriform, nearly equilaterally to compressedtrigonous or usually some biconvex, angles evident or obscure, 0.8–1.1 × 0.6–0.8 mm, neck very short, finely rugulose and sometimes finely (or coarsely) cancellate at 10–20X with 14–20 blunt horizontal ridges in a vertical series.
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Tubercles brown (to whitish), pyramidal, usually depressed, often rudimentary, 0.15–0.3 × 0.2–0.35 mm.
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spinulose
obscurely to clearly retrorsely
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subterete
greatly compressed
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0-5 times as wide as thick
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