Scirpus polyphyllus

Vahl

Enum. Pl. 2: 274. 1805.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 16. Mentioned on page 10, 15, 17.

Plants cespitose; rhizomes short, tough, fibrous. Culms: fertile ones erect or reclining; nodes sometimes with axillary bulblets. Leaves 14–22 (–26) per culm; sheaths of proximal leaves green or brownish; proximal sheaths and blades with septa usually few, inconspicuous; blades 16–31 cm × 5–8 mm. Inflorescences terminal, rarely also with 1 lateral inflorescence from distal leaf-axil; rays divaricate, smooth throughout or scabrous distally, rays usually with axillary bulblets; bases of involucral-bracts green, not glutinous. Spikelets in dense clusters of 3–9 (largest cluster with 6 or more), spikelets sessile, broadly ovoid, 2.5–4 × 1.6–3 mm; scales reddish-brown with green midribs, circular or nearly so, 1–1.5 mm, apex mucronate or occasionally short-awned, mucro or awn 0.2–0.3 mm. Flowers: perianth bristles persistent, 6, stout, contorted, much longer than achene and projecting beyond it, retrorsely barbed in distal 1/2, exserted from scales at maturity; styles 3-fid. Achenes pale-brown, obovate or nearly obtriangular in outline, plumply trigonous or planoconvex, 1.1–1.4 (–1.8) × 0.8–1 mm. 2n = 58.


Phenology: Fruiting summer (Jul–Aug).
Habitat: Along wooded streams and other swampy places, usually shaded by trees
Elevation: 0–1000 m

Distribution

V23 12-distribution-map.jpg

Ala., Ark., Conn., D.C., Ga., Ill., Ind., Ky., Md., Mass., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., S.C., Tenn., Vt., Va., W.Va.

Discussion

Scirpus polyphyllus occasionally hybridizes with S. atrovirens.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

... more about "Scirpus polyphyllus"
0.14 cm1.4 mm <br />0.0014 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
papillose +
planoconvex;trigonous;obtriangular;obovate +
shorter to much +
0.8mm;1mm +
short-awned;mucronate +
Alan T. Whittemore +  and Alfred E. Schuyler +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
persistent +
16 cm160 mm <br />0.16 m <br /> (31 cm310 mm <br />0.31 m <br />) +
keeled +, v--shaped +  and flat +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
Barbed (?) +, Toothed (?) +  and Curled (?) +
parallel +  and divergent +
terete +, rolled +  and plicate +
reclining +  and erect +
trigonous +
Ala. +, Ark. +, Conn. +, D.C. +, Ga. +, Ill. +, Ind. +, Ky. +, Md. +, Mass. +, Miss. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, S.C. +, Tenn. +, Vt. +, Va. +  and W.Va. +
0–1000 m +
hypogynous +  and subtending +
biconvex +  and trigonous +
Along wooded streams and other swampy places, usually shaded by trees +
corymbose-paniculate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
cauline +, all +  and basal +
brownish +  and green +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
Fruiting summer (Jul–Aug). +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
divaricate +
adventitious +
nearly +  and circular +
reddish-brown +
basal +  and proximal +
2-keeled +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
cylindric +
not fibrous +
Illustrated +  and Endemic +
0 cm0 mm <br />0 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
50 +  and 500 +
1.6mm;3mm +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
Scirpus polyphyllus +
species +
not +  and rhizomatous +
plant +  and cespitose +