Difference between revisions of "Carex haydenii"
Amer. J. Sci. Arts, ser. 2, 18: 103. 1854.
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|name=Carex acuta var. erecta | |name=Carex acuta var. erecta | ||
|authority=Dewey | |authority=Dewey | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Carex rousseaui | |name=Carex rousseaui | ||
|authority=Raymond | |authority=Raymond | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Carex stricta var. decora | |name=Carex stricta var. decora | ||
|authority=L. H. Bailey | |authority=L. H. Bailey | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Carex stricta var. haydenii | |name=Carex stricta var. haydenii | ||
|authority=(Dewey) Kükenthal | |authority=(Dewey) Kükenthal | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Cyperaceae;Carex;Carex sect. Phacocystis;Carex haydenii | |hierarchy=Cyperaceae;Carex;Carex sect. Phacocystis;Carex haydenii | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Carex haydenii | name=Carex haydenii | ||
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|authority=Dewey | |authority=Dewey | ||
|rank=species | |rank=species | ||
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|publication year=1854 | |publication year=1854 | ||
|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/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_704.xml |
|genus=Carex | |genus=Carex | ||
|section=Carex sect. Phacocystis | |section=Carex sect. Phacocystis | ||
Revision as of 20:10, 16 December 2019
Plants cespitose. Culms acutely angled, 30–115 cm, scabrous. Leaves: basal sheaths red-brown, indistinctly ladder-fibrillose; sheaths of proximal leaves glabrous, fronts with red-brown spots, veinless, apex U-shaped; blades 3–5 mm wide. Inflorescences: proximal bract subequal to inflorescence, 2–4 mm wide. Spikes erect; proximal 2–3 spikes pistillate, 1–5 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, 1.5–2.8 × 1.5–2 mm, dull, apex rounded, papillose; beak green, 0.1–0.2 mm. Achenes not constricted, glaucous. 2n = 54.
Phenology: Fruiting Jun–Aug.
Habitat: Wet meadows, moist prairies
Elevation: 0–1,000 m
Distribution
N.B., Ont., Que., Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mo., Nebr., N.H., N.Y., N.Dak., Ohio, Pa., S.Dak., Vt., Wis.
Discussion
Carex haydenii is a species of seasonally saturated soils in open habitats. It appears to be declining in abundance with changes in land use.
Carex haydenii is often confused with C. stricta; it can be identified by the inflated perigynia that are rounded apically, acute scales, and glabrous leaves and sheaths. Only basal sheaths of C. haydenii are ladder-fibrillose. Although often sympatric with C. stricta and C. nigra, no hybrids appear to be formed.
Selected References
None.