Difference between revisions of "Eleocharis ambigens Fernald (Q3285)"
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Latest revision as of 12:36, 24 June 2022
Eleocharis ambigens is a taxon with the rank species within the series Eleocharis ser. Eleocharis
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Eleocharis ambigens Fernald
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Eleocharis ambigens is a taxon with the rank species within the series Eleocharis ser. Eleocharis
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Statements
taxon/id/Eleocharis ambigens Fernald
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Eleocharis ambigens Fernald
Eleocharis ambigens
Fernald
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-QC
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FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York. http://www.efloras.org/volume_page.aspx?volume_id=1023&flora_id=1
CA-QC
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US-CT
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US-FL
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US-GA
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US-LA
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US-MA
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US-MS
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US-NJ
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US-NC
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US-RI
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US-SC
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US-TX
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US-VA
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Plants perennial, mat-forming;
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rhizomes evident, long, 1–2 mm thick, firm, cortex persistent, longer internodes 1–3 cm, scales persistent, 5–10 mm, membranous, not fibrous.
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Culms terete, often with to 16 blunt ridges when dry, 25–80 cm × 0.5–1.5 mm, firm, internally spongy.
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Leaves: distal leaf-sheaths persistent, not splitting, proximally dark red, distally red to stramineous or green, often callose, thinly papery (to membranous), apex dark redbrown, obtuse to subtruncate, tooth sometimes present on some culms, to 0.3 mm.
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Spikelets ovoid to lanceoloid, 5–23 × 2–3 (–4) mm, apex acute (to obtuse);
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proximal scale amplexicaulous, entire;
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floral scales often spreading in fruit, 10–60, 3–4 per mm of rachilla, medium brown, rarely redbrown, midrib regions mostly stramineous to green, in proximal part of spikelet ovate, in distal part lanceolate, 2.5–3.5 × 1.7 mm, entire, apex acute to rarely obtuse, often carinate in distal part of spikelet.
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Flowers: perianth bristles 2–4 (–5), brown, slender to stout, usually very unequal, rudimentary to equaling achene;
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anthers brown, 1.5–2 mm;
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styles 2-fid, sometimes some 3-fid.
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Achenes not persistent, dark yellow or stramineous, obovoid to obpyriform, all biconvex or some (very rarely all) compressedtrigonous, angles obscure, 1–1.5 × 0.9–1.25 mm, apex rounded, neck absent (to very short), finely rugulose at 10–20X, with 20 or more horizontal ridges in vertical series and/or finely cancellate at 10–30X.
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Tubercles brown or proximally whitish, pyramidal, depressed, rarely some as high as wide, 0.15–0.3 (–0.5) × (0.3–) 0.4–0.6 mm. 2n = 44, 45, 46.
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distally red
stramineous or green
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