Carex arenaria

Linnaeus

Sp. Pl. 2: 973. 1753.

IntroducedIllustrated
Treatment appears in FNA Volume 23. Treatment on page 307. Mentioned on page 303, 306.

Culms trigonous, 15–60 cm, scabrous-angled. Leaves: sheath with apex of inner band yellowish, thickened, concave; ligules 1.5–2.2 mm; blades 1.5–4 mm wide. Inflorescences 2–8 cm; spikes 5–20, ascending, ovate; proximal spikes pistillate, the middle androgynous or staminate; terminal spike usually staminate. Pistillate scales reddish-brown with green center and hyaline margins, ovate, 5–7.8 mm, usually longer than perigynia, apex acute to acuminate. Perigynia prominently thin-winged at apex, lanceolate to broadly ovate, (4–) 4.5–6 × 1.3–3.3 mm; beak poorly defined, 1.2–2.5 mm. 2n = 58, 60–64, 64.


Phenology: Fruiting May–Jul.
Habitat: Maritime sand dunes and sandy, disturbed areas near the coast, 0–30 m

Distribution

V23 536-distribution-map.jpg

Introduced; Del., Md., N.C., Oreg., Va., Eurasia

Discussion

Carex arenaria was first collected in North America in 1870; it remains quite local in distribution.

Selected References

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Carex arenaria"
biconvex +
smaller +
A. A. Reznicek +
Linnaeus +
shortened +
whitish-hyaline +, hyaline +  and narrow +
rounded +
not spongy +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
v--shaped +
1.5mm;4mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
black +  and brown +
scabrous-angled +  and trigonous +
15 cm150 mm <br />0.15 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Del. +, Md. +, N.C. +, Oreg. +, Va. +  and Eurasia +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Maritime sand dunes and sandy, disturbed areas near the coast, 0–30 m +
ovoid +  and cylindric +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
sessile +, staminate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
serrulate +  and winglike +
with (1-)3-6(-30) bristles and/or scales +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
Fruiting May–Jul. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
adventitious +
reddish-brown +
persistent +
usually longer +
basal +  and proximal +
0.5 cm5 mm <br />0.005 m <br /> (0.78 cm7.8 mm <br />0.0078 m <br />) +
Introduced +  and Illustrated +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex arenaria +
Carex sect. Ammoglochin +
species +
plant +, colonial +  and not cespitose +