Carex deweyana

Schweinitz

Ann. Lyceum Nat. Hist. New York 1: 65. 1824.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 324. Mentioned on page 323.

Plants densely cespitose. Culms 14–89 (–101) cm × 0.3–1.1 mm wide, smooth or papillose. Leaves: ligule on distal leaf 0.9–2.2 mm, as long as wide; blades 0.6–4.2 mm wide, widest blade 2.4–4.2 mm wide. Inflorescences 12–56 mm; proximal internode 6–34 mm; proximal bracts 6–49 mm, awn 7–46 mm; spikes (2–) 3–5, longest ones 2–5, usually gynecandrous; proximal spikes with 1–2 staminate and (5–) 7–12 pistillate flowers, 5.2–11 (–13) × (2.1–) 3.7–6.9 mm; terminal spikes usually with 1–3 (–5) staminate and (7–) 9–13 (–16) pistillate flowers, 6.8–13 × 3.8–8.1 mm. Pistillate scales with colorless or stramineous margins, 3–4.5 × 1.6–2.2 mm, body 2.8–4.2 mm, apex acuminate to short-awned, awn to 0.6 mm. Staminate scales with colorless or stramineous margins, 3–5.3 × 1.2–1.6 mm, apex acute to acuminate or occasionally short-awned to 0.3 mm. Anthers (1.8–) 1.9–2.2 mm. Perigynia erect to ascending, green to pale-brown, 0–5-veined abaxially, usually veinless adaxially, narrowly ovate, 4–4.9 (–5.2) × 1.3–1.5 (–1.6) mm, 2.9–3.8 times as long as wide, apex gradually tapering; beak 1.4–2.1 mm, 0.32–0.4 times as long as perigynia, margins serrulate, apex entire or bidentulate, teeth to 0.2 mm, 0–0.05 times as long as perigynia. Stigmas 1.9–2 mm. Achenes 1.8–2.2 × 1.2–1.5 mm wide, 1.3–1.8 times as long as wide.

Distribution

V23 573-distribution-map.jpg

Alta., B.C., Man., N.B., N.S., N.W.T., Ont., P.E.I., Que., Sask., Yukon, Alaska, Colo., Conn., Ill., Iowa, Maine, Mass., Mich., Minn., Mont., N.Dak., N.H., N.J., N.Mex., N.Y., Ohio, Pa., S.Dak., Vt., Wash., Wis., Wyo.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Longest inflorescences 35–56 mm; longest proximal internodes (11–)13–34 mm; longest proximal bracts 15–49 mm. Carex deweyana var. deweyana
1 Longest inflorescences 12–32 mm; longest proximal internodes 6–10 mm; longest proximal bracts 9–12(–18) mm. Carex deweyana var. collectanea

"longest" is not a number."-0.05timesaslongasperigynia" is not declared as a valid unit of measurement for this property.

... more about "Carex deweyana"
planoconvex;biconvex +
1.2mm;1.5mm +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
bidentulate +  and entire +
0 cm0 mm <br />0 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Robert F. C. Naczi +
Schweinitz +
0 cm0 mm <br />0 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
shortened +
cuneate +  and rounded +
Deweyanae +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
0.32-0.4 times as long as perigynia +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
v--shaped +  and flat +
0.6mm;4.2mm +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
green;hyaline +
papillose +  and smooth +
round +  and trigonous +
0.3mm;1.1mm +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, N.W.T. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Conn. +, Ill. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Ohio +, Pa. +, S.Dak. +, Vt. +, Wash. +, Wis. +  and Wyo. +
pistillate +  and staminate +
hypogynous +  and subtending +
7 +  and 12 +
biconvex +  and trigonous +
1.2 cm12 mm <br />0.012 m <br /> (5.6 cm56 mm <br />0.056 m <br />) +
sessile +, staminate +  and pistillate +
androgynous +  and gynecandrous +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
stramineous +  and colorless +
with (1-)3-6(-30) bristles and/or scales +
veinless +  and 0-5-veined +
0.49 cm4.9 mm <br />0.0049 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
green +  and pale-brown +
0.4 cm4 mm <br />0.004 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
erect +  and ascending +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.6 cm6 mm <br />0.006 m <br /> (4.9 cm49 mm <br />0.049 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
1.1 cm11 mm <br />0.011 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
0.52 cm5.2 mm <br />0.0052 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.69 cm6.9 mm <br />0.0069 m <br />) +
Ann. Lyceum Nat. Hist. New York +
adventitious +
staminate +  and pistillate +
whitish +  and castaneous +
0.3 cm3 mm <br />0.003 m <br /> (0.53 cm5.3 mm <br />0.0053 m <br />) +
basal +  and proximal +
2-keeled +
1.2mm;1.6mm +
cylindric +
Illustrated +  and Endemic +
gynecandrous +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
deciduous +
2-3(-4)-fid +
enlarged +
Carex deweyana +
Carex sect. Deweyanae +
species +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.81 cm8.1 mm <br />0.0081 m <br />) +
0 cm0 mm <br />0 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
plant +  and cespitose +
2.4mm +  and 4.2mm +