Carex silicea

Olney

Proc. Amer. Acad. Arts 7: 393. 1868.

Common names: Carex silicicole
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 369. Mentioned on page 334, 337, 367.

Plants densely cespitose. Culms 15–85 cm; vegetative culms inconspicuous. Leaves: sheaths conspicuously green-veined adaxially nearly to collar, narrow hyaline band or sharp Y-shaped region at collar, adaxially firm, summits truncate, prolonged 1–4 mm beyond collar, lateral auricles usually present, finely papillose (30X); distal ligules 1.2–3.5 mm; blades 2–4 per fertile culm, ± whitish green, 10–25 cm × 1–5 mm, stiff. Inflorescences arching or nodding, open, silvery green, (2.5–) 4–8 cm × 5–12 mm; proximal internode 5–22 mm; 2d internode 6–19 mm; proximal bracts scalelike or bristlelike, shorter than inflorescences. Spikes 3–7 (–12), distant, distinct, ellipsoid, (5–) 10–20 × 4–8 mm, bases clavate, apex acute to obtuse; staminate portion of well-developed spikes 2–11 mm. Pistillate scales white-hyaline, with green to gold midstripe, ovate, 4–5.2 mm, as long as and narrower than perigynia, margins frequently involute, apex acute; staminate scales with apex acute. Perigynia appressed, light-brown, conspicuously 6–12-veined abaxially, conspicuously 3–5-veined adaxially, obovate to elliptic, somewhat concavo-convex, 3.5–5 × 2–3.2 mm, 0.5–0.6 mm thick, margin flat, including wing 0.5–0.8 mm wide, somewhat papillose; beak light-brown at tip, flat, ciliate-serrulate, abaxial suture with conspicuous white-hyaline margin, distance from beak tip to achene 1.5–2.5 mm. Achenes elliptic, 1.6–1.8 × 1–1.2 mm, 0.5–0.6 mm thick. 2n = 74, 76.


Phenology: Fruiting early–mid summer.
Habitat: Coastal sand and gravel flats and dunes
Elevation: 0 m

Distribution

V23 651-distribution-map.jpg

N.B., Nfld. and Labr. (Nfld.), N.S., P.E.I., Que., Conn., Del., Maine, Md., Mass., N.H., N.J., N.Y., R.I., Va.

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Carex silicea"
biconvex +
smaller +
0.5mm +  and 0.6mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
shortened +
persistent +
clavate +
not enlarged +
ciliate-serrulate +
whitish green +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
2 (?) +  and 4 (?) +
v--shaped +
1mm;5mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex silicicole +
inconspicuous +
fertile +  and vegetative +
round +  and trigonous +
15 cm150 mm <br />0.15 m <br /> (85 cm850 mm <br />0.85 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, P.E.I. +, Que. +, Conn. +, Del. +, Maine +, Md. +, Mass. +, N.H. +, N.J. +, N.Y. +, R.I. +  and Va. +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Coastal sand and gravel flats and dunes +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
nodding +  and arching +
0.6 cm6 mm <br />0.006 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white-hyaline +
conspicuous +
papillose +
0.5mm +  and 0.8mm +
green +  and gold +
with (1-)3-6(-30) bristles and/or scales +
3-5-veined +  and 6-12-veined +
erect +  and spreading +
0.5mm +  and 0.6mm +
Fruiting early–mid summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.5 cm5 mm <br />0.005 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Proc. Amer. Acad. Arts +
y--shaped +  and sharp +
adventitious +
staminate +  and pistillate +
white-hyaline +
basal +  and proximal +
0.4 cm4 mm <br />0.004 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
well-developed +
distinct +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
ellipsoid +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
prolonged +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Carex silicea +
Carex sect. Ovales +
species +
plant +  and cespitose +