Difference between revisions of "Carex laxiflora"
in J. Lamarck et al., Encycl. 3: 392. 1792.
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|accepted_name=Carex laxiflora | |accepted_name=Carex laxiflora | ||
− | |accepted_authority=Lamarck | + | |accepted_authority=Lamarck |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in J. Lamarck et al., Encycl. | |title=in J. Lamarck et al., Encycl. | ||
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}} | }} | ||
|common_names=Carex laxiflore | |common_names=Carex laxiflore | ||
+ | |special_status={{Treatment/ID/Special_status | ||
+ | |code=F | ||
+ | |label=Illustrated | ||
+ | }}{{Treatment/ID/Special_status | ||
+ | |code=E | ||
+ | |label=Endemic | ||
+ | }} | ||
|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Carex laxiflora var. serrulata | |name=Carex laxiflora var. serrulata | ||
|authority=F. J. Hermann | |authority=F. J. Hermann | ||
+ | |rank=variety | ||
}} | }} | ||
|hierarchy=Cyperaceae;Carex;Carex sect. Laxiflorae;Carex laxiflora | |hierarchy=Cyperaceae;Carex;Carex sect. Laxiflorae;Carex laxiflora | ||
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name=Carex laxiflora | name=Carex laxiflora | ||
− | + | |authority=Lamarck | |
− | |authority=Lamarck | ||
|rank=species | |rank=species | ||
|parent rank=section | |parent rank=section | ||
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|publication title=in J. Lamarck et al., Encycl. | |publication title=in J. Lamarck et al., Encycl. | ||
|publication year=1792 | |publication year=1792 | ||
− | |special status= | + | |special status=Illustrated;Endemic |
− | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_798.xml |
|genus=Carex | |genus=Carex | ||
|section=Carex sect. Laxiflorae | |section=Carex sect. Laxiflorae |
Latest revision as of 21:43, 5 November 2020
Culms densely tufted, lateral or central, ascending or lax to decumbent, 39–47 cm × 0.8–2 mm. Leaves: basal sheaths light brown; sheaths 6–22 mm; blades ascending, midrib and 2 lateral veins developed, occasionally slightly corrugated, 19–25 cm × 5–26 mm, blades of overwintering leaves smooth or, rarely, sparsely papillose abaxially. Inflorescences: peduncles of proximal spikes erect, 0–3.4 cm, of lateral spikes 1.4–3.3(–5.3) times as long as spikes they subtend; of terminal spikes 1–2.2 cm. Bracts 7.2–17.5 cm × 2–8 mm, bract blade of distal lateral spikes linear, narrower than spikes, widest bract blade of distalmost lateral spike 0.5–3.4 mm wide. Spikes (3–)4 per culm; lateral spikes 9–33 × 3.2–4 mm; terminal spike linear to clavate, 23–24(–34) × 1.5–3 mm. Pistillate scales 2.5–3 × 1.2–1.5 mm, apex acute or apiculate. Staminate scales 3–3.5 × 1–1.5 mm, oblong-ovate, margins white-hyaline or brownish, apex obtuse or acute. Anthers 2.6–3 mm. Perigynia 3–20 per spike, usually separate, ratio of longer lateral spike length to perigynia number 1.9–3.4, ascending, conspicuously (22–)25–32-veined, (2.6–)3.2–4.1(–4.6) × 1.2–1.6 mm; beak straight, 0.5–1.4 mm. Achenes broadly ellipsoid, 1.8–2.2(–3.4) × 1–1.4 mm. 2n = 40.
Phenology: Fruiting spring–early summer.
Habitat: Dry or moist, deciduous or mixed deciduous-evergreen forests, higher elevations southward
Elevation: 0–1000 m
Distribution
![V23 798-distribution-map.jpg](/w/images/1/17/V23_798-distribution-map.jpg)
N.S., Ont., Que., Ala., Ark., Conn., Del., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Vt., Va., W.Va., Wis.
Discussion
The Carex laxiflora complex contains a wide array of phenotypic variation and deserves further research. F. J. Hermann (1938) proposed the name C. laxiflora var. serrulata; however, among the numerous specimens of C. laxiflora we studied, the key characteristic of ciliate-serrulate bract-sheaths varied greatly.
Selected References
None.