Difference between revisions of "Bolboschoenus robustus (Pursh) Soják (Q3390)"
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Latest revision as of 12:38, 24 June 2022
Bolboschoenus robustus is a taxon with the rank species within the genus Bolboschoenus
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Bolboschoenus robustus (Pursh) Soják
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Bolboschoenus robustus is a taxon with the rank species within the genus Bolboschoenus
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Statements
taxon/id/Bolboschoenus robustus (Pursh) Soják
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Bolboschoenus robustus (Pursh) Soják
Bolboschoenus robustus
(Pursh) Soják
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-NS
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Herbier Marie-Victorin (MT). Université de Montréal, Montréal, QC. Specimen. http://www.biodiversite.umontreal.ca/herbier-marie-victorin?lang=en
US-AL
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US-AR
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US-CA
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US-CT
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US-DE
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US-FL
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US-GA
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US-LA
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US-ME
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US-MD
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US-MA
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US-MS
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US-NH
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US-NJ
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US-NY
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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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Culms 50–150 cm × 4–8 mm.
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Leaves: sheaths reaching beyond middle of culm, fronts usually convex, papery at mouth, veins reaching margin, or occasionally membranous with veins diverging proximal to apex leaving triangular, veinless area;
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widest blade 4–12 mm wide.
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Inflorescences simply branched with 1 or not more than 1/2 of spikelets solitary or in clusters of 2 (–3) on 1–7 rays, rays not exceeding 7 cm;
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involucral-bracts that surpass inflorescence 2–4, widest bract 2–7 mm wide.
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Spikelets (1–) 5–25, broadly ovoid to rarely lanceoloid, 10–30 × 6–10 mm, base usually truncate;
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scales usually tightly imbricate, medium to dark orangebrown, lineolate-spotted at 15X, usually 6–9 × 3–4 mm, papery and nearly opaque, rarely membranous, apex 2-fid, 1 mm deep, awn very stout, 2–3 × 0.5 mm at base.
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Flowers: perianth bristles not persistent on shed achene or 1–2 weakly attached to shed achene, dark redbrown, 1/2 achene length;
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anthers brownish orange, 1.5–2.5 mm;
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styles (2–) 3-fid.
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Achenes dark to medium brown, obovoid, compressedtrigonous with broadly rounded abaxial angle or sometimes biconvex, 2.7–3.5 × 1.8–2.8 mm, apex truncate to broadly rounded, beak 0.1–0.3 mm, surface glossy, exocarp cells evident at 10–20X;
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in achene cross-section exocarp 2 times thicker than mesocarp and its cells greatly enlarged, 3 times or more deeper than wide;
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achene specific gravity much less than water.
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broadly ovoid
rarely lanceoloid
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2 times thicker than mesocarp and its cells greatly enlarged
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3 times or more deeper than wide
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