Carex tonsa (Fernald) E. P. Bicknell (Q70)
Carex tonsa is a taxon with the rank species within the section Carex sect. Acrocystis
| Language | Label | Description | Also known as |
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| English |
Carex tonsa (Fernald) E. P. Bicknell
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Carex tonsa is a taxon with the rank species within the section Carex sect. Acrocystis
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Statements
taxon/id/Carex tonsa (Fernald) E.P. Bicknell
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Carex tonsa (Fernald) E.P. Bicknell
Carex tonsa
(Fernald) E.P. Bicknell
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-AB
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CA-BC
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CA-MB
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CA-NB
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CA-NS
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CA-ON
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CA-PE
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CA-QC
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CA-SK
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US-CT
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US-DC
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US-GA
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US-IL
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US-IN
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US-ME
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US-MA
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US-MD
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US-MI
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US-MN
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US-NC
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US-NH
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US-NJ
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US-NY
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US-OH
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US-PA
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US-SC
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US-VT
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US-WV
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US-WI
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Plants densely to loosely cespitose;
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rhizomes ascending to erect, brown to reddish-brown, 0–10 mm, stout.
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Culms 4–16 cm, scabrous distally;
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bases (remnants of old leaves) fibrous.
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Leaf-blades pale to bright green, equaling or exceeding stems, 0.5–4.3 mm wide, herbaceous or coriaceous, glabrous abaxially, strongly scabrous to papillose adaxially.
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Inflorescences with both staminate and pistillate scales;
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peduncles of basal pistillate spikes erect, short-to-elongate, stout to slender;
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peduncles of staminate spikes 0.8–15 mm;
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proximal nonbasal bracts scalelike, shorter than inflorescences.
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Spikes: proximal pistillate spikes 2–3 (basal spikes 1–2);
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cauline spikes usually overlapping with staminate spikes, with 3–10 (–15) perigynia;
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staminate spikes 4.5–11.3 × 1.1–3 mm.
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Scales: pistillate scales pale-brown to reddish-brown, with narrow white margins, ovate, 2.9–4.1 × 1.5–1.9 mm, equaling or exceeding perigynia, apex acute to long-acuminate;
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staminate scales ovate, 4.2–5.4 × 1.2–2.1 mm, apex obtuse or acute to acuminate.
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Anthers 1.6–2.9 mm.
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Perigynia green to pale-brown, veinless, ellipsoid, obtusely trigonous in cross-section, 3.1–4.7 × 1.1–1.6 mm;
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beak straight, pale green, occasionally with reddish-brown tinge near apex, strongly 2-edged, 0.9–2 mm, smooth or ciliate-serrulate, apical teeth 0.2–0.5 mm.
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Achenes brown, ellipsoid to obovoid, obtusely trigonous in cross-section, 1.6–2 × 1.2–1.6 mm.
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