Carex albicans

Willdenow ex Sprengel

Syst. Veg 3: 818. 1826.

Illustrated
Treatment appears in FNA Volume 23. Treatment on page 541. Mentioned on page 534.

Plants densely to loosely cespitose; rhizomes ascending or horizontally spreading, reddish-brown to dark reddish purple, 0–70 mm, slender. Culms 10–45 cm, smooth to scabrous distally; bases (remnants of old leaves) slightly or not at all fibrous. Leaf-blades pale to bright green, shorter to longer than culms, 0.8–2.5 mm wide, herbaceous, smooth to scabrous abaxially, papillose to scabrous adaxially. Inflorescences with both staminate and pistillate spikes; peduncles of staminate spikes 0.4–9.9 mm; proximal nonbasal bracts leaflike, shorter than inflorescences. Spikes: proximal pistillate spikes 1–4 (basal spikes 0); cauline spikes overlapping, proximal 2 spikes usually separated by less than 7 mm, with 4–14 perigynia; staminate spikes 5–14 × 0.5–1.8 mm. Scales: pistillate scales pale to dark reddish-brown, with narrow white margins, lanceolate to ovate or obovate, 2.2–3.4 × 0.4–1.8 mm, equaling or exceeding perigynia, apex usually acuminate, sometimes acute or mucronate; staminate scales lanceolate to ovate, 2.8–6 × 0.6–1.9 mm, apex acute to acuminate. Anthers 1.5–2.7 mm. Perigynia pale green, veinless, ellipsoid, 2.3–3.3 × 0.8–1.2 mm, longer than wide; beak straight, pale green, 0.6–1.1 mm, weakly ciliate-serrulate, apical teeth 0.1–0.4 mm. Stigmas 3. Achenes brown, ellipsoid, acutely trigonous in cross-section, 1.2–1.7 × 0.7–1.3 mm.

Distribution

V23 1019-distribution-map.jpg

N.B., N.S., Ont., Que., Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Mass., Md., Mich., Miss., Mo., N.C., N.H., N.J., N.Y., Nebr., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., Vt., W.Va., Wis., Mexico

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Rhizomes long, horizontally spreading. Carex albicans var. australis
1 Rhizomes short, ascending to erect. > 2
2 Scales from median portion of staminate spike without prominent midrib extending to tip and without minute teeth on midrib (15X); perigynium apical teeth 0.2–0.3 mm; staminate spikes 8.4–11.1 mm. Carex albicans var. albicans
2 Scales from median portion of staminate spike with either prominent midrib extending to tip (and sometimes beyond) or minute teeth on midrib (15X); perigynium apical teeth 0.1–0.3 mm; staminate spikes 2.8–4 mm. Carex albicans var. emmonsii
... more about "Carex albicans"
0.12 cm1.2 mm <br />0.0012 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
trigonous;ellipsoid +
0.7mm;1.3mm +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
beaked +, awned +  and cuspidate +
glabrous +  and pubescent +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
William J. Crins +  and Jeff H. Rettig +
Willdenow ex Sprengel +
shortened +
rounded +  and tapering +
ciliate-serrulate +
straight +
bidentate +  and bent +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
v--shaped +
2mm;4.5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
brown +  and red +
smooth to scabrous +
round +  and trigonous +
10 cm100 mm <br />0.1 m <br /> (45 cm450 mm <br />0.45 m <br />) +
N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Mass. +, Md. +, Mich. +, Miss. +, Mo. +, N.C. +, N.H. +, N.J. +, N.Y. +, Nebr. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Va. +, Vt. +, W.Va. +, Wis. +  and Mexico +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
prophyllate +, pedunculate +, staminate +, , +  and pistillate +
pale +  and bright green +
papillose;scabrous +
shorter to longer +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
with (1-)3-6(-30) bristles and/or scales +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
scale-like +  and filiform +
reddish-brown +  and dark reddish +
spreading +  and ascending +
0 cm0 mm <br />0 m <br /> (7 cm70 mm <br />0.07 m <br />) +
adventitious +
staminate +  and pistillate +
pale +  and dark reddish-brown +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
basal +  and proximal +
lanceolate;ovate +
exceeding perigynia +  and equaling +
0.6mm;1.9mm +
cylindric +
Illustrated +
staminate +  and pistillate +
0.5 cm5 mm <br />0.005 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.99 cm9.9 mm <br />0.0099 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Montanae +
Carex albicans +
Carex sect. Acrocystis +
species +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
stoloniferous +  and rhizomatous +
plant +  and cespitose +