Carex michauxiana

Boeckeler

Linnaea 41: 336. 1877.

Common names: Carex de Michaux
IllustratedEndemic
Basionym: Carex rostrata Michaux Fl. Bor.-Amer. 2: 173. 1803,
Treatment appears in FNA Volume 23. Treatment on page 515. Mentioned on page 516.

Culms obtusely trigonous in cross-section, 15–70 cm, smooth. Leaves: ligules 1.2–3 mm, wider than long; blades yellowish green, M-shaped to flat, widest leaves 1.6–3.5 (–4.2) mm wide, smooth abaxially, minutely papillose adaxially, especially distally. Inflorescences 1.8–18 cm; bract sheaths with apex concave; proximal (1–) 2–3 (–4) spikes pistillate, distal spikes erect, aggregated or the proximal sometimes remote, ovoid. Pistillate scales narrowly ovate, mostly 1/3–2/3 length of perigynia, apex acute. Anthers 1.1–2.7 mm. Perigynia spreading or the proximal somewhat reflexed, yellowish green, 20–26-veined, essentially uninflated, lanceolate, 8.7–12.1 × 1.3–2.1 mm, 4–7 times as long as wide, apex tapered, bidentulate; beak absent. Achenes 2.2–3 × 1.2–1.7 mm.


Phenology: Fruiting late spring–summer.
Habitat: Bogs, fens, lakeshores, stream banks, open seeps, in sandy or peaty, often acidic soils
Elevation: 0–1000 m

Distribution

V23 962-distribution-map.jpg

St. Pierre and Miquelon, Man., N.B., Nfld. and Labr., N.S., Ont., Que., Sask., Maine, Md., Mass., Mich., Minn., N.H., N.Y., Vt., Wis.

Discussion

Carex michauxiana is closely related to the east Asian C. dolichocarpa C. A. Meyer ex V. I. Kreczetowicz.

Selected References

None.

Lower Taxa

None.

"/3lengthofperigynia" is not declared as a valid unit of measurement for this property.

... more about "Carex michauxiana"
0.22 cm2.2 mm <br />0.0022 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
trigonous;ovoid;oblong-ovoid +
smaller +
1.2mm;1.7mm +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
bidentulate +
A. A. Reznicek +
Boeckeler +
shortened +
not +  and fibrous +
round-tapering +
Carex rostrata +
bidentate +
yellowish green +
m-shaped +  and flat +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex de Michaux +
brown +  and yellowish +
trigonous +
15 cm150 mm <br />0.15 m <br /> (70 cm700 mm <br />0.7 m <br />) +
prophyllate +  and pedunculate +
St. Pierre and Miquelon +, Man. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, Que. +, Sask. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.Y. +, Vt. +  and Wis. +
0–1000 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Bogs, fens, lakeshores, stream banks, open seeps, in sandy or peaty, often acidic soils +
1.8 cm18 mm <br />0.018 m <br /> (18 cm180 mm <br />0.18 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
wider than long +
with (1-)3-6(-30) bristles and/or scales +
stipitate +  and veined +
Fruiting late spring–summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathing +  and leaflike +
0.87 cm8.7 mm <br />0.0087 m <br /> (1.21 cm12.1 mm <br />0.0121 m <br />) +
lanceolate +  and uninflated +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
adventitious +
basal +  and proximal +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
persistent +
2-3(-4)-fid +
Carex sect. Folliculatae +
Carex michauxiana +
Carex sect. Rostrales +
species +
purple +  and red +
plant +  and cespitose +
1.6mm +  and 3.5mm +