Carex pachystachya

Chamisso ex Steudel

Syn. Pl. Glumac. 2: 197. 1855.

Illustrated
Synonyms: Carex macloviana subsp. pachystachya (Chamisso ex Steudel) Hultén
Treatment appears in FNA Volume 23. Treatment on page 349. Mentioned on page 334, 345, 346, 350.

Plants densely cespitose. Culms 15–120 cm. Leaves: sheath white hyaline or green-veined, summits usually U-shaped, often prolonged to 4 mm beyond collar; distal ligules 1–2.5 (–4) mm; blades 3–4 (–5) per fertile culm, 10–30 cm × 1.2–4.2 (–6.5) mm. Inflorescences dense or open, gold to dark-brown, 0.9–2.8 cm × 6.7–16.3 mm; proximal internode 0.7–4.5 (–9) mm; 2d internode 0.7–4 mm; proximal bracts usually scalelike, sometimes bristlelike, shorter than inflorescences. Spikes 3–9 (–13), distinct or densely aggregated and individually indistinct, ovoid to broadly ovoid, 4.4–10 × 3.2–8.7 mm, appearing coarse-textured, base acute to rounded, apex rounded. Pistillate scales dark gold or redbrown to dark-brown, usually with pale or green midstripe, ovate, 2.2–3.7 (–4.2) mm, less than or equaling perigynia in length and width, margin white, 0–0.15 mm wide, apex obtuse to long-acute. Perigynia ascending to spreading, golden brown or coppery to blackish, conspicuously (0–) 2–9-veined abaxially, conspicuously 0–4 (–7) -veined adaxially, veins reaching top of achene, ovate to elliptic-ovate, planoconvex, 2.8–4.7 (–5.1) × 1.1–2.3 mm, 0.5–0.7 mm thick, margin flat, including wing 0.2–0.4 mm wide, sometimes filled with pithlike tissue near base, ciliate-serrulate at least on distal body, occasionally with white margin, with metallic sheen; beak redbrown to black at tip, sometimes white-hyaline, cylindric, unwinged, ± entire for 0.4–0.7 mm, suture usually inconspicuous, distance from beak tip to achene 1.5–2.2 (–2.8) mm. Achenes elliptic to broadly ovate, 1.2–1.9 × 0.7–1.4 mm, 0.4–0.6 mm thick. 2n = 74.


Phenology: Fruiting summer.
Habitat: Moist to wet, open meadows, strands along lakeshores, forest edges
Elevation: 0–3500 m

Distribution

V23 604-distribution-map.jpg

Alta., B.C., Sask., Yukon, Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo., Asia (Siberia)

Discussion

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 pachystachya"
0.22 cm2.2 mm <br />0.0022 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
elliptic;broadly ovate +
smaller +
0.4mm +  and 0.6mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Chamisso ex Steudel +
shortened +
persistent +
tapering +  and rounded +
not enlarged +
coarse-textured +
cylindric +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 (?) +  and 4 (?) +
v--shaped +
1.2mm;4.2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
15 cm150 mm <br />0.15 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Alta. +, B.C. +, Sask. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +, Wyo. +  and Asia (Siberia) +
0–3500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Moist to wet, open meadows, strands along lakeshores, forest edges +
gold +  and dark-brown +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.2mm +  and 0.4mm +
green +  and pale +
with (1-)3-6(-30) bristles and/or scales +
0-4(-7)-veined +  and (0-)2-9-veined +
coppery +  and blackish +
ascending +  and spreading +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
Syn. Pl. Glumac. +
adventitious +
0.37 cm3.7 mm <br />0.0037 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
redbrown +  and dark-brown +
basal +  and proximal +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +
distinct +
0.44 cm4.4 mm <br />0.0044 m <br /> (1 cm10 mm <br />0.01 m <br />) +
acute;rounded +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.87 cm8.7 mm <br />0.0087 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 /> (0.4 cm4 mm <br />0.004 m <br />) +
inconspicuous +
Carex macloviana subsp. pachystachya +
Carex pachystachya +
Carex sect. Ovales +
species +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
plant +  and cespitose +