Difference between revisions of "Carex aperta"
in W. J. Hooker, Fl. Bor-Amer. 2: 218, plate 219. 1839.
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|name=Carex accedens | |name=Carex accedens | ||
|authority=T. Holm | |authority=T. Holm | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Carex acutina var. tenuior | |name=Carex acutina var. tenuior | ||
|authority=L. H. Bailey | |authority=L. H. Bailey | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Carex aperta var. umbrosa | |name=Carex aperta var. umbrosa | ||
|authority=Kükenthal | |authority=Kükenthal | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Carex aperta var. viridans | |name=Carex aperta var. viridans | ||
|authority=Kükenthal | |authority=Kükenthal | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Carex stylosa var. virens | |name=Carex stylosa var. virens | ||
|authority=L. H. Bailey | |authority=L. H. Bailey | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Carex turgidula | |name=Carex turgidula | ||
|authority=unknown | |authority=unknown | ||
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|elevation=0–900 m | |elevation=0–900 m | ||
|distribution=Alta.;B.C.;Idaho;Mont.;Oreg.;Wash. | |distribution=Alta.;B.C.;Idaho;Mont.;Oreg.;Wash. | ||
| − | |discussion=<p>Carex aperta and C. haydenii appear to be a very closely related, allopatric pair of species that may not be closely related to other members of the section. This species-pair is distinguished by the inflated perigynia, the acute scales that are longer than the perigynia, and the unique chromosome number. Carex aperta is distinguished from C. haydenii by its rhizomatous habit, the dull brown achenes, and the entire beak. It is sometimes mistaken for the sympatric taxa that also lack veins on the perigynia, C. aquatilis and C. scopulorum; mature specimens can easily be identified by the inflated perigynia.</p> | + | |discussion=<p><i>Carex aperta</i> and <i>C. haydenii</i> appear to be a very closely related, allopatric pair of species that may not be closely related to other members of the section. This species-pair is distinguished by the inflated perigynia, the acute scales that are longer than the perigynia, and the unique chromosome number. <i>Carex aperta</i> is distinguished from <i>C. haydenii</i> by its rhizomatous habit, the dull brown achenes, and the entire beak. It is sometimes mistaken for the sympatric taxa that also lack veins on the perigynia, <i>C. aquatilis</i> and <i>C. scopulorum</i>; mature specimens can easily be identified by the inflated perigynia.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1839 | |publication year=1839 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V23/V23_703.xml |
|genus=Carex | |genus=Carex | ||
|section=Carex sect. Phacocystis | |section=Carex sect. Phacocystis | ||
Revision as of 16:10, 18 September 2019
Plants not cespitose. Culms acutely angled, 15–90 cm, scabrous. Leaves: basal sheaths red-brown; sheaths of proximal leaves with blades, backs glabrous, fronts with pale brown spots, veinless, glabrous, apex U-shaped, membranous, colorless; blades 3–6 mm wide. Inflorescences: proximal bract subequal to inflorescence, 2–4 mm wide. Spikes: erect; proximal 2–3 spikes pistillate, 1.5–3.5 cm × 4–6 mm, base obtuse; terminal 1–2 spikes staminate. Pistillate scales red-brown, longer than perigynia, apex acute or acuminate, awnless. Perigynia divergent, olive-brown with red-brown spots on apical 1/2, veinless, inflated, loosely enclosing achenes, obovoid, 2.5–2.8 × 1.5–2 mm, dull, apex rounded, papillose; beak green, 0.1–0.3 mm. Achenes not constricted, dull. 2n = 54.
Phenology: Fruiting Jul–Aug.
Habitat: Wet meadows
Elevation: 0–900 m
Distribution
Alta., B.C., Idaho, Mont., Oreg., Wash.
Discussion
Carex aperta and C. haydenii appear to be a very closely related, allopatric pair of species that may not be closely related to other members of the section. This species-pair is distinguished by the inflated perigynia, the acute scales that are longer than the perigynia, and the unique chromosome number. Carex aperta is distinguished from C. haydenii by its rhizomatous habit, the dull brown achenes, and the entire beak. It is sometimes mistaken for the sympatric taxa that also lack veins on the perigynia, C. aquatilis and C. scopulorum; mature specimens can easily be identified by the inflated perigynia.
Selected References
None.