View source for Carex richardsonii

{{Treatment/ID
|accepted_name=Carex richardsonii
|accepted_authority=R. Brown
|publications={{Treatment/Publication
|title=in J. Franklin et al., Narr. Journey Polar Sea,
|place=751. 1823
|year=1823
}}
|common_names=Richardson’s sedge;carex de Richardson
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Cyperaceae;Carex;Carex sect. Clandestinae;Carex richardsonii
|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. Clandestinae]]</div><div class="higher-taxon"><small>species</small>[[Carex richardsonii]]</div></div>
|volume=Volume 23
|mention_page=page 545, 546, 548
|treatment_page=page 547
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>loosely cespitose, long-rhizomatous. <b>Culms</b> 14–32 cm. <b>Leaves</b>: basal sheaths dark purplish to reddish brown; blades mostly basal, pale green, shorter than culms, thick, 0.9–3.3 mm wide. <b>Inflorescences</b>: peduncles of proximal pistillate spikes to 7 cm; peduncles of terminal staminate spikes 3.3–15.7 mm; proximal bracts long-sheathing; pistillate spikes 2–4, emerging from cauline nodes, widely separated, ascending, ovoid to ellipsoid or short-cylindric; terminal staminate spikes 17.4–23 × 2.5–3.8 mm. <b>Scales</b>: pistillate scales reddish brown, ovate, apex acute to obtuse, glabrous; staminate scales reddish brown, ovate to obovate, margins silvery-white, apex acute to short-acuminate, scarious. <b>Anthers</b> 2.1–2.6 mm. <b>Perigynia</b> obovoid to oblanceoloid, 2.4–2.9 × 1–1.3 mm, base tapering, pubescent with straight white hairs; beak straight, 0.2–0.5 mm. <b>Stigmas</b> 3, flexuous, thin, strongly papillose. <b>Achenes</b> ellipsoid to obovoid, 1.7–1.8 × 1.1–1.2 mm. <b>2n</b> = 52.</span><!--

-->{{Treatment/Body
|phenology=Fruiting late spring–summer (late May–mid Jul).
|habitat=Vernally moist (often drying later in the season), open woodlands, alvars, floodplain edges, prairies, and basic and acidic outcrops
|elevation=50–1400 m
|distribution=Alta.;B.C.;Man.;N.W.T.;Ont.;Que.;Sask.;Ill.;Ind.;Iowa;Md.;Mich.;Minn.;N.Y.;N.Dak.;Ohio;Pa.;S.Dak.;Vt.;Wis.;Wyo.
|discussion=<p><i>Carex richardsonii</i> is common on the Canadian prairies and in open montane woodlands east of the Cascades. Farther east, it is a rare plant of alvars, tall-grass prairie remnants, and postglacial shorelines, such as those of Lake Iroquois (in Ontario and New York) and Lake Barlow-Ojibway (in Quebec). It is most closely related to, and perhaps the ancestor of, <i>C. concinnoides</i>. Chromosomal data and phylogenetic analysis may help to test that contention.</p><!--
--><p>The long, dark reddish brown sheaths are a conspicuous field mark. Late in the growing season, the leaves often turn dark wine red. This species tends to have low seed set.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Carex richardsonii
|authority=R. Brown
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Cyperaceae
|phenology=Fruiting late spring–summer (late May–mid Jul).
|habitat=Vernally moist (often drying later in the season), open woodlands, alvars, floodplain edges, prairies, and basic and acidic outcrops
|elevation=50–1400 m
|distribution=Alta.;B.C.;Man.;N.W.T.;Ont.;Que.;Sask.;Ill.;Ind.;Iowa;Md.;Mich.;Minn.;N.Y.;N.Dak.;Ohio;Pa.;S.Dak.;Vt.;Wis.;Wyo.
|reference=None
|publication title=in J. Franklin et al., Narr. Journey Polar Sea,
|publication year=1823
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_1036.xml
|genus=Carex
|section=Carex sect. Clandestinae
|species=Carex richardsonii
}}<!--

-->[[Category:Treatment]][[Category:Carex sect. Clandestinae]]