Carex albursina

E. Sheldon

Bull. Torrey Bot. Club 20: 284. 1893.

Common names: Carex du lac à l’Ours-Blanc
IllustratedEndemic
Basionym: Carex laxiflora var. latifolia Boott Ill. Carex, 38, plate 93. 1858,
Treatment appears in FNA Volume 23. Treatment on page 440. Mentioned on page 432, 437, 439, 452.

Culms densely tufted, lateral, ascending or lax to decumbent, distinctly winged, 10–62 cm × 2–2.4 mm; basal sheath light-brown to brown, the proximal frequently wine-red or purple, small, triangular. Leaves: sheaths 2–15 mm; blades ascending, midrib well developed, 2 lateral-veins conspicuous, slightly more so than other veins, flat, thin, 10–35 cm × 10–38 mm, widest leaf 13–38 (–62) mm wide, blades of overwintering leaves smooth. Inflorescences: peduncles of proximal spikes to 5.8 cm; of terminal spike absent. Bracts 1.4–2.6 cm × 3.9–2.2 (–3.2) mm; bract blades of distal lateral spikes lanceolate or narrowly lanceolate, wider than spikes, concealing them, widest bract blade of distalmost lateral spike (2.9–) 3.2–8.3 mm wide. Spikes 4 (–5) per culm; lateral spikes 6–36 × 3–4.2 mm; terminal spike erect, linear, 4–18 × 1.2–1.6 mm, often hidden by distal 2 pistillate spikes and distal bract blade, frequently exceeded by distal 2 pistillate bracts. Pistillate scales oblong, 2.8–3.2 × 1.4–2 mm, apex obtuse or truncate, awnless (sometimes mucronate). Staminate scales oblong-ovate, 2.8–3.2 × 1.4–2 mm, margins hyaline, apex obtuse. Anthers 2–2.2 mm. Perigynia 3–20 per spike, strongly to loosely overlapping, erect or ascending, obovate, 3–4.2 × 1.8–2.1 mm; beak abruptly bent, 0.3–0.6 mm. Achenes ovoid, 2.5–3.8 × 1.6–1.8 mm. 2n = 44.


Phenology: Fruiting spring.
Habitat: Moist deciduous or deciduous-evergreen forests, on steep slopes, or often, around limestone escarpments, washes, slides, or cave entrances
Elevation: 100–1200 m

Distribution

V23 807-distribution-map.jpg

Ont., Que., Ala., Ark., Conn., D.C., Ga., Ill., Ind., Iowa, Ky., Md., Mass., Mich., Minn., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Vt., Va., W.Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.

"wider" is not a number.

... more about "Carex albursina"
0.25 cm2.5 mm <br />0.0025 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
1.6mm;1.8mm +
0.2 cm2 mm <br />0.002 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Charles T. Bryson +  and Robert F. C. Naczi +
E. Sheldon +
shortened +
light-brown;brown +
tapering +
Carex laxiflora var. latifolia +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
m--shaped +
0mm;20mm +
2-ranked +  and arranged +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.83 cm8.3 mm <br />0.0083 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
ascending +  and appressed +
scale-like +  and leaflike +
0.39 cm3.9 mm <br />0.0039 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex du lac à l’Ours-Blanc +
purple +  and brown +
10 cm100 mm <br />0.1 m <br /> (62 cm620 mm <br />0.62 m <br />) +
round +  and trigonous +
2mm;2.4mm +
Ont. +, Que. +, Ala. +, Ark. +, Conn. +, D.C. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.C. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
100–1200 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist deciduous or deciduous-evergreen forests, on steep slopes, or often, around limestone escarpments, washes, slides, or cave entrances +
10 cm100 mm <br />0.1 m <br /> (35 cm350 mm <br />0.35 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
prophyllate +, pedunculate +  and pistillate +
0.6 cm6 mm <br />0.006 m <br /> (3.6 cm36 mm <br />0.036 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
overwintering +
basal +  and cauline +
0 cm0 mm <br />0 m <br /> (5.8 cm58 mm <br />0.058 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
stipitate +  and 8-veined +
not black-mottled +, yellowbrown +  and dark-brown +
0.3 cm3 mm <br />0.003 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
ascending +  and erect +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Fruiting spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
long-sheathing +  and leaflike +
awned +  and acute +
Bull. Torrey Bot. Club +
adventitious +
staminate +  and pistillate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
basal +  and proximal +
oblong-ovate;oblong +
1.4mm;2mm +
cylindric +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex albursina +
Carex sect. Laxiflorae +
species +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
plant +  and cespitose +
13mm +  and 38mm +