Carex microptera

Mackenzie

Muhlenbergia 5: 56. 1909.

Illustrated
Synonyms: Carex festivella Mackenzie Carex limnophila F. J. Hermann Carex macloviana subsp. festivella (Mackenzie) Á. Löve & D. Löve Carex microptera var. crassinervia F. J. Hermann
Treatment appears in FNA Volume 23. Treatment on page 351. Mentioned on page 334, 342, 350, 352.

Plants densely cespitose. Culms 20–110 cm. Leaves: sheath adaxially white-hyaline, summits usually U-shaped, occasionally prolonged to 3 mm beyond collar; distal ligules (1–) 2–3 (–6) mm; blades (2–) 3–7 per fertile culm, 10–50 cm × 2–5 mm. Inflorescences usually dense, light to dark-brown and green, (0.8–) 1.1–2.6 cm × 9.5–17.5 mm; proximal internode 0.5–3 (–4) mm; 2d internode 0.5–2 (–3) mm; proximal bracts scalelike or rarely leaflike, occasionally bristlelike, shorter than inflorescences. Spikes 4–10 (–14), densely aggregated, individually indistinct, usually broadly ovoid, 5–9 (–11) × 4.3–7 mm, base and apex rounded or sometimes acute. Pistillate scales brown, often red, purple, or coppery tinged, with pale or green midstripe, ovate, 2.4–3.5 mm, shorter than and narrower or as wide as perigynia, white margin 0–0.1 mm wide, apex acute. Perigynia ascending to spreading, green or straw colored to brown when mature, conspicuously (0–) 3–8 (–11) -veined abaxially, conspicuously 0–8-veined adaxially, veins usually not reaching top of achene, ovate to broadly ovate, flat except over achene or ± planoconvex because of air within, (2.8–) 3.4–4.5 (–5.2) × 1.1–2.4 mm, 0.3–0.5 mm thick, margin flat, including wing 0.2–0.5 mm wide, ciliate-serrulate at least on distal body, without metallic sheen, dull to slightly shiny; beak tip gold or redbrown to dark-brown, cylindric, unwinged, at least 1 mm, ± entire for 0.2–0.6 (–0.9) mm, abaxial suture inconspicuous or with white margin, distance from beak tip to achene 1.5–2.5 (–2.8) mm. Achenes ovate to obovate, 1.1–1.6 × 0.7–1.2 mm, 0.3–0.5 mm thick. 2n = 80, 90.


Phenology: Fruiting late spring–fall.
Habitat: Moderately wet to dry meadows, slopes, along watercourses, disturbed habitats
Elevation: 200–3400 m

Distribution

V23 608-distribution-map.jpg

Alta., B.C., Man., N.W.T., Sask., Yukon, Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., S.Dak., Utah, Wash., Wyo., Mexico

Discussion

In high montane habitats it is sometimes difficult to distinguish Carex microptera from C. haydeniana.

Selected References

None.

Lower Taxa

None.

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

... more about "Carex microptera"
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
with white margin +  and inconspicuous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
ovate;obovate +
smaller +
0.3mm +  and 0.5mm +
planoconvex +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Mackenzie +
shortened +
persistent +
acute +  and rounded +
not enlarged +
redbrown +  and dark-brown +
cylindric +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
3 (?) +  and 7 (?) +
v--shaped +
2mm;5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Alta. +, B.C. +, Man. +, N.W.T. +, Sask. +, Yukon +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wyo. +  and Mexico +
200–3400 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moderately wet to dry meadows, slopes, along watercourses, disturbed habitats +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
light +  and dark-brown and green +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
dull +  and slightly shiny +
0.2mm +  and 0.5mm +
green +  and pale +
with (1-)3-6(-30) bristles and/or scales +
0-8-veined +  and (0-)3-8(-11)-veined +
straw colored +  and brown +
ascending +  and spreading +
Fruiting late spring–fall. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Muhlenbergia +
adventitious +
coppery tinged +, purple +, red +  and brown +
basal +  and proximal +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
as-wide-as perigynia;narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.43 cm4.3 mm <br />0.0043 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
prolonged +
u--shaped +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Carex festivella +, Carex limnophila +, Carex macloviana subsp. festivella +  and Carex microptera var. crassinervia +
Carex microptera +
Carex sect. Ovales +
species +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
plant +  and cespitose +