Cyperus lancastriensis

Porter in A. Gray

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, ovatelanceolate, (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"
yellowish-brown +  and brown +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
3-4 times long +
0.6mm;0.7mm +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Gordon C. Tucker* +, Brian G. Marcks* +  and J. Richard Carter * +
Porter in A. Gray +
shortened +
persistent +  and deciduous +
decurrent +
w--shaped +  and keeled +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
5 cm50 mm <br />0.05 m <br /> (35 cm350 mm <br />0.35 m <br />) +
horizontal +  and ascending +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
Porter’s sedge +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
20 cm200 mm <br />0.2 m <br /> (80 cm800 mm <br />0.8 m <br />) +
scabridulous +
trigonous +
1mm;3mm +
ascending +  and spreading +
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 +
0.46 cm4.6 mm <br />0.0046 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
reddish striate +, yellow-tinted +  and whitish green +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
ovatelanceolate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
hypogynous +  and subtending +
biconvex +  and trigonous +
Disturbed, sunny or partly shaded places in mesic or dry-mesic soils, often on riverbanks and flood plains +
subumbellate +  and capitate +
spreading +  and erect +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
20cm +  and 70cm +
w--shaped +
0.5 cm5 mm <br />0.005 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
scabridulous +
with (1-)3-6(-30) bristles and/or scales +
Fruiting summer (Jul–Aug). +
2-3(-4)-carpellate +
antrorse +  and extrorse +
3 (?) +  and 1 (?) +
in A. Gray, Manual ed. +
continuous +, articulate +, winged +  and wingless +
conspicuous +
unequal +
5 +  and 10 +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
visible +  and inconspicuous +
adventitious +
basal +  and proximal +
cylindric;compressed +
cylindric +
Illustrated +  and Endemic +
2.5 cm25 mm <br />0.025 m <br /> (4.3 cm43 mm <br />0.043 m <br />) +
densely ellipsoid;obovoid +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
50 +  and 90 +
terete-quadrangular;linear-lanceoloid;linear-subulate +
1.1mm;1.6mm +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2-3-fid +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Cyperus refractus var. lancastriensis +  and Mariscus lancastriensis +
Cyperus lancastriensis +
Cyperus subg. Cyperus +
species +
tuberous +, stoloniferous +  and rhizomatous +
herb +  and cespitose +