Cyperus lancastriensis

Porter

in A. Gray, Manual ed. 5 issue 6, 555. 1867.

Common names: Porter’s sedge
IllustratedEndemic
Synonyms: Cyperus refractus var. lancastriensis (Porter) Kükenthal Mariscus lancastriensis (Porter) C. B. Clarke
Treatment appears in FNA Volume 23. Mentioned on page 182.

Herbs, perennial, cespitose, with inconspicuous, short rhizomes scarcely visible between culm bases. Culms basally cormlike, trigonous, (10–)20–80 cm × 1–3 mm, glabrous. Leaves inversely W-shaped, 20–70 cm × 5–11 mm, adaxial surface, margins minutely scabridulous. Inflorescences: spikes densely ellipsoid to obovoid, 2.5–4.3 × 1.5–3 cm; rays 5–10, 4–20 cm, glabrous; rachis 7–14 mm; bracts 3–8, horizontal to ascending at 45°, flat, 5–35 cm × 2.5–6 mm; rachilla persistent, wings 0.5 mm wide. Spikelets 50–90, linear-lanceoloid to linear-subulate, ± terete-quadrangular, (11–)12–13(–15) × 1.1–1.6 mm; distal spikelet spreading or ascending; floral scales persistent, 3–6(–8), appressed, whitish green or often yellow-tinted, sometimes reddish striate, laterally 4-ribbed, ovate-lanceolate, (3.9–)4.2–4.6(–4.8) × 1.6–2 mm. Flowers: anthers 0.7–1 mm; styles 1–1.5 mm; stigmas 2–3 mm. Achenes yellowish brown to brown, ± stipitate, conspicuously falcate, 3–4 times long as wide, oblong, 2.2–2.6 × 0.6–0.7 mm, apex obtuse, surfaces puncticulate.


Phenology: Fruiting summer (Jul–Aug).
Habitat: Disturbed, sunny or partly shaded places in mesic or dry-mesic soils, often on riverbanks and flood plains
Elevation: 0–800 m

Distribution

V23 311-distribution-map.jpg

Ala., Ark., Del., D.C., Fla., Ga., Ky., Md., Mo., N.J., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Cyperus lancastriensis"
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Porter +
Porter’s sedge +
Ala. +, Ark. +, Del. +, D.C. +, Fla. +, Ga. +, Ky. +, Md. +, Mo. +, N.J. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Va. +  and W.Va. +
0–800 m +
Disturbed, sunny or partly shaded places in mesic or dry-mesic soils, often on riverbanks and flood plains +
Fruiting summer (Jul–Aug). +
in A. Gray, Manual ed. +
Illustrated +  and Endemic +
Cyperus refractus var. lancastriensis +  and Mariscus lancastriensis +
Cyperus lancastriensis +
Cyperus subg. Cyperus +
species +