View source for Carex tonsa

{{Treatment/ID
|accepted_name=Carex tonsa
|accepted_authority=(Fernald) E. P. Bicknell
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=35: 492. 1908
|year=1908
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Carex umbellata var. tonsa
|authority=Fernald
|rank=variety
|publication_title=Proc. Amer. Acad. Arts
|publication_place=37: 507. 1902
}}
|synonyms={{Treatment/ID/Synonym
|name=Carex rugosperma var. tonsa
|authority=(Fernald) E. G. Voss
|rank=variety
}}
|hierarchy=Cyperaceae;Carex;Carex sect. Acrocystis;Carex tonsa
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cyperaceae]]</div><div class="higher-taxon"><small>genus</small>[[Carex]]</div><div class="higher-taxon"><small>section</small>[[Carex sect. Acrocystis]]</div><div class="higher-taxon"><small>species</small>[[Carex tonsa]]</div></div>
|volume=Volume 23
|mention_page=page 538
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>densely to loosely cespitose; rhizomes ascending to erect, brown to reddish brown, 0–10 mm, stout. <b>Culms</b> 4–16 cm, scabrous distally; bases (remnants of old leaves) fibrous. <b>Leaf</b> 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. <b>Inflorescences</b> with both staminate and pistillate scales; peduncles of basal pistillate spikes erect, short to elongate, stout to slender; peduncles of staminate spikes 0.8–15 mm; proximal nonbasal bracts scalelike, shorter than inflorescences. <b>Spikes</b>: proximal pistillate spikes 2–3 (basal spikes 1–2); cauline spikes usually overlapping with staminate spikes, with 3–10(–15) perigynia; staminate spikes 4.5–11.3 × 1.1–3 mm. <b>Scales</b>: 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; staminate scales ovate, 4.2–5.4 × 1.2–2.1 mm, apex obtuse or acute to acuminate. <b>Anthers</b> 1.6–2.9 mm. <b>Perigynia</b> green to pale brown, veinless, ellipsoid, obtusely trigonous in cross section, 3.1–4.7 × 1.1–1.6 mm; 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. <b>Stigmas</b> 3. <b>Achenes</b> brown, ellipsoid to obovoid, obtusely trigonous in cross section, 1.6–2 × 1.2–1.6 mm.</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;D.C.;Ga.;Ill.;Ind.;Maine;Mass.;Md.;Mich.;Minn.;N.C.;N.H.;N.J.;N.Y.;Ohio;Pa.;S.C.;Vt.;W.Va.;Wis.
|discussion=<p>Varieties 2 (2 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Perigynia with few hairs near base of beak, otherwise glabrous; leaves pale green, often relatively short, coriaceous, usually smooth adaxially.
|[[Carex tonsa var. tonsa|Carex tonsa var. tonsa]]
|-id=key-0-1
|1
|Perigynia pubescent on beak and body; leaves bright green, much longer than culms, herbaceous, scabrous to papillose adaxially.
|[[Carex tonsa var. rugosperma|Carex tonsa var. rugosperma]]
|}
</div></div><!--

-->{{#Taxon:
name=Carex tonsa
|authority=(Fernald) E. P. Bicknell
|rank=species
|parent rank=section
|synonyms=Carex rugosperma var. tonsa
|basionyms=Carex umbellata var. tonsa
|family=Cyperaceae
|distribution=Alta.;B.C.;Man.;N.B.;N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;D.C.;Ga.;Ill.;Ind.;Maine;Mass.;Md.;Mich.;Minn.;N.C.;N.H.;N.J.;N.Y.;Ohio;Pa.;S.C.;Vt.;W.Va.;Wis.
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1908
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_1011.xml
|genus=Carex
|section=Carex sect. Acrocystis
|species=Carex tonsa
}}<!--

-->

[[Category:Treatment]]
[[Category:Carex sect. Acrocystis]]
[[Category:Revised Since Print]]