Carex scoparia

Schkuhr ex Willdenow

Sp. Pl. 4(1): 230. 1805.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 362. Mentioned on page 335, 336, 341, 360, 368.

Plants densely cespitose. Culms 20–100 cm; vegetative culms with few leaves clustered at apex. Leaves: sheath summits U-shaped; distal ligules 2.3–4.8 mm; blades 3–5 per fertile culm, 10–32 cm × 1.4–3 (–3.5) mm. Inflorescences arching or nodding, dense or open, green, yellow, or brown at maturity, 1.5–6 cm × 5–20 mm; proximal internode 2–12 mm; 2d internode 2–13 mm; proximal bracts scalelike, with bristle tip. Spikes 3–10, distinct, ellipsoid, 7–16 × 3–9 (–13) mm, base acute to short-attenuate, apex acute to rounded. Pistillate scales hyaline brown, occasionally with green or gold midstripe, lanceolate, 3.4–4 mm, shorter and narrower than perigynia, apex acuminate. Perigynia ascending or rarely widely spreading, golden brown, conspicuously 5-veined on each face or fewer adaxially, winged to base, lanceolate, flat except over achene, 4.2–6.8 × 1.2–2 mm, length at least 3 times width, 0.35–0.55 mm thick, margin flat, including wing 0.2–0.6 mm wide; beak pale to golden-brown at tip, flattish, ciliate-serrulate, abaxial suture with white or golden brown hyaline margin, distance from beak tip to achene 2.2–4.8 mm. Achenes ovate or elliptic, 1.3–1.7 × 0.7–0.9 mm, 0.3–0.4 mm thick.

Distribution

V23 632-distribution-map.jpg

Alta., B.C., Man., N.B., N.S., Nfld. and Labr. (Nfld.), Ont., P.E.I., Que., Ark., Calif., Colo., Conn., D.C., Del., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Mass., Md., Mich., Minn., Miss., Mo., Mont., N.C., N.H., N.J., N.Y., Nebr., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Va., Vt., W.Va., Wash., Wis., into Europe and New Zealand

Discussion

Varieties 2 (2 in the flora).

Carex scoparia is variable and may, in fact, be a complex of at least 2 species. Given current understanding, 2 varieties are recognized:

Selected References

None.

Key

1 Pistillate scales and perigynium apex golden brown or pale brown, similar in color to perigynium body; perigynia 4.2–6.8 mm, (2.5–)2.8–4 times as long as wide; spikes densely aggregated to distant. Carex scoparia var. scoparia
1 Pistillate scales and perigynium apex reddish brown, chestnut, or blackish, contrasting with lighter golden brown perigynium body; perigynia 4.2–5 mm, 2–2.6 times as long as wide; spikes aggregated. Carex scoparia var. tessellata

"+timesaslongasinflorescences" is not declared as a valid unit of measurement for this property."not undefined" is not a number.

... more about "Carex scoparia"
elliptic;ovate +
smaller +
0.3mm +  and 0.4mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Schkuhr ex Willdenow +
shortened +
persistent +
fewer;fewer +
acute +  and short-attenuate +
not enlarged +
ciliate-serrulate +
flattish +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
10 cm100 mm <br />0.1 m <br /> (32 cm320 mm <br />0.32 m <br />) +
3 (?) +  and 5 (?) +
v--shaped +
1.4mm;3mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
fertile +  and vegetative +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Nfld. and Labr. (Nfld.) +, Ont. +, P.E.I. +, Que. +, Ark. +, Calif. +, Colo. +, Conn. +, D.C. +, Del. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.C. +, N.H. +, N.J. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +  and into Europe and New Zealand +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
brown +, yellow +  and green +
nodding +  and arching +
0.2 cm2 mm <br />0.002 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
hyaline +, golden brown +  and white +
0.2mm +  and 0.6mm +
gold +  and green +
with (1-)3-6(-30) bristles and/or scales +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.68 cm6.8 mm <br />0.0068 m <br />) +
spreading +  and ascending +
0.35mm +  and 0.55mm +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
adventitious +
hyaline brown +
basal +  and proximal +
lanceolate +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
shorter and narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
distinct +
0.7 cm7 mm <br />0.007 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
ellipsoid +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
Carex scoparia +
Carex sect. Ovales +
species +
plant +  and cespitose +