Difference between revisions of "Carex petricosa"

Dewey

Amer. J. Sci. Arts 29: 246, plate W, fig. 70. 1836.

Illustrated
Treatment appears in FNA Volume 23. Treatment on page 478. Mentioned on page 477, 479.
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|distribution=n North America;e temperate Asia.
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|distribution=Alta.;B.C.;N.W.T.;Que.;Yukon;Alaska;Mont.;e temperate Asia.
 
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
 
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
 
--><p><i>Carex petricosa</i> shows considerable variation, even within one clone, in the distribution of staminate and pistillate flowers in the inflorescence. The two taxa recognized can usually be distinguished by stigma number. A small number of individuals are to determine on purely morphologic grounds.</p>
 
--><p><i>Carex petricosa</i> shows considerable variation, even within one clone, in the distribution of staminate and pistillate flowers in the inflorescence. The two taxa recognized can usually be distinguished by stigma number. A small number of individuals are to determine on purely morphologic grounds.</p>
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|family=Cyperaceae
 
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|distribution=n North America;e temperate Asia.
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|distribution=Alta.;B.C.;N.W.T.;Que.;Yukon;Alaska;Mont.;e temperate Asia.
 
|reference=None
 
|reference=None
 
|publication title=Amer. J. Sci. Arts
 
|publication title=Amer. J. Sci. Arts
 
|publication year=1836
 
|publication year=1836
|special status=
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|special status=Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_876.xml
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|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V23/V23_876.xml
 
|genus=Carex
 
|genus=Carex
 
|section=Carex sect. Aulocystis
 
|section=Carex sect. Aulocystis

Revision as of 21:38, 27 May 2020

Plants loosely cespitose; rhizomes slender, long. Culms 10–90 cm. Leaves: blades 1–3.5 mm wide. Inflorescences 3–12(–22) cm; proximal internodes 10–60(–100) mm; peduncles of proximal spikes to 8 cm; proximal bracts with blades 5–140 mm, sheaths cylindric, 5–25(–35) mm, mouth 0.9–1.5 mm wide. Spikes 3–8; lateral spikes androgynous or pistillate, rarely some entirely staminate, the proximal inclined or pendent, 5–30 × 3–7 mm; terminal spike staminate or androgynous, 10–28 × 1.8–4 mm. Pistillate scales brown to black, oblong-obovate, 3–5.8 × 1.1–2 mm, apex obtuse to acute, sometimes shortly awned. Staminate scales brown or black with hyaline margins, oblong-ovate, 3.1–6.2 × 1–3 mm. Anthers 1.5–3 mm. Perigynia ascending, pale yellow proximally, brown or black distally, 3–9-veined, lanceolate, 3.5–5.5 × 1.1–2.4 mm, margins ciliate-serrulate distally, apex tapered, shortly setose, sometimes setae confined to veins, or subglabrous; beak indistinct, to 0.5(–1) mm. Achenes obovoid, 1.7–2.2 × 1–1.3 mm.

Distribution

V23 876-distribution-map.jpg

Alta., B.C., N.W.T., Que., Yukon, Alaska, Mont., e temperate Asia.

Discussion

Varieties 2 (2 in the flora).

Carex petricosa shows considerable variation, even within one clone, in the distribution of staminate and pistillate flowers in the inflorescence. The two taxa recognized can usually be distinguished by stigma number. A small number of individuals are to determine on purely morphologic grounds.

Selected References

None.

Key

1 Stigmas 3; achenes trigonous in at least 1/2 of pistillate flowers and fruits. Carex petricosa var. petricosa
1 Stigmas 2; achenes biconvex in at least 1/2 of pistillate flowers and fruits. Carex petricosa var. misandroides