Carex sychnocephala

J. Carey

Amer. J. Sci. Arts, ser. 2, 4: 24. 1847.

Common names: Carex compact
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 332. Mentioned on page 254.

Culms aphyllopodic, smoothly 3-angled, 8–40 cm. Leaves: sheath white-hyaline adaxially, summit U-shaped, smooth; distal ligule 0.5–4.3 mm; blades 0–3 per culm, 12 cm × 1.2–3 mm. Inflorescences green or pale-brown, 1.6–3 cm × 7–15 mm; proximal internode (2–) 4–8 mm, 2d internode 1.7–4 mm; bracts appressed to ascending. Spikes 3–8, densely clustered except, often, the proximal 1–2, obovoid-oblanceoloid, 10–16 × 5–7 mm, base acute to acuminate, apex truncate. Pistillate scales white or gold-hyaline with green or gold midstripe, lanceolate to ovate, to 3.5–4.5 mm, shorter than or longer than perigynia. Perigynia appressed, green or gold to light-brown, conspicuously 3–12-veined abaxially, 0–9-veined adaxially, wing 0.1–0.15 (–0.2) mm wide, narrowly lanceolate, (4.6–) 5.5–7.3 × 0.7–1.2 mm, 0.3–0.4 mm thick; beak tip white, green, or gold, narrowly flat, distance from beak tip to achene 3–5 mm, ± ciliate-serrulate. Achenes elliptic to ovate, 1–1.8 × 0.6–0.8 mm, 0.3–0.4 mm thick. 2n = 64.


Phenology: Fruiting summer–fall.
Habitat: Wet areas, at least seasonally, open, sandy, silty or peaty shores, banks, on limestone
Elevation: less than 1500 m

Distribution

V23 593-distribution-map.jpg

Alta., B.C., Man., N.W.T., Ont., Que., Sask., Yukon, Alaska, Colo., Iowa, Mich., Minn., Mo., Mont., N.Y., N.Dak., S.Dak., Wash., Wis.

Discussion

Because Carex sychnocephala often lacks conspicuous rhizomes and has a small diffuse root system, it may appear to be annual. In some situations, it may actually grow as an annual.

Selected References

None.

Lower Taxa

None.

"(" is not declared as a valid unit of measurement for this property.

... more about "Carex sychnocephala"
elliptic;ovate +
smaller +
0.3mm +  and 0.4mm +
Joy Mastrogiuseppe +
J. Carey +
shortened +
persistent +
acute +  and acuminate +
enlarged +
gold +, green +  and white +
12 cm120 mm <br />0.12 m <br /> (?) +
0 (?) +  and 3 (?) +
v--shaped +
1.2mm;3mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
appressed +  and ascending +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex compact +
aphyllopodic +
3-angled +
8 cm80 mm <br />0.08 m <br /> (40 cm400 mm <br />0.4 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Iowa +, Mich. +, Minn. +, Mo. +, Mont. +, N.Y. +, N.Dak. +, S.Dak. +, Wash. +  and Wis. +
less than 1500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet areas, at least seasonally, open, sandy, silty or peaty shores, banks, on limestone +
pale-brown +  and green +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
20 cm200 mm <br />0.2 m <br /> (25 cm250 mm <br />0.25 m <br />) +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
gold +  and green +
with (1-)3-6(-30) bristles and/or scales +
0-9-veined +  and 3-12-veined +
gold +  and light-brown +
Fruiting summer–fall. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Amer. J. Sci. Arts, ser. +
adventitious +
gold-hyaline +  and white +
basal +  and proximal +
lanceolate;ovate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
u--shaped +
Carex sychnocephala +
Carex sect. Cyperoideae +
species +
plant +  and cespitose +
lanceolate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.1mm +  and 0.15mm +