Carex disticha

Hudson

Fl. Angl., 347. 1762.

Common names: Carex distique
IntroducedIllustrated
Treatment appears in FNA Volume 23. Treatment on page 302. Mentioned on page 303.

Culms trigonous, scabrous-angled distally, 30–120 cm; vegetative culms somewhat taller. Leaves: basal sheaths brown; sheaths with inner band green, veined, apex hyaline, prolonged 0.7–3 mm; glabrous; ligules 1.8–16 mm; blades 1.8–5.2 mm wide. Inflorescences contracted near middle, 2–7 cm; spikes ascending, ovate, 4–16 × 1.2–9 mm, basal spikes larger than those near middle. Pistillate scales reddish-brown at maturity, hyaline margins very narrow or absent, ovate, acute to acuminate, glabrous. Staminate scales reddish-brown, narrowly ovate, apex acute to acuminate, glabrous. Perigynia (3.8–) 4–5.5 (–6.1) × 1.7–2.3 mm; beak (0.8–) 1–1.9 (–2.3) mm. Achenes brown.


Phenology: Fruiting Jun–Jul.
Habitat: Wet meadows, stream banks, disturbed areas
Elevation: 30–200 m

Distribution

V23 526-distribution-map.jpg

Introduced; Ont., Que., Eurasia

Discussion

The Eurasian Carex disticha, thus far still a sporadic introduction, has been collected at two sites in Canada, both associated with ports on the Great Lakes-St. Lawrence system. A specimen to confirm a third, older report from near Belleville, Ontario, also on the Great Lakes, could not be located and verified (P. M. Catling et al. 1988).

Selected References

None.

Lower Taxa

None.

"prolonged" is not a number."taller" is not a number.

... more about "Carex disticha"
biconvex +
smaller +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
A. A. Reznicek +  and Paul M. Catling +
Hudson +
shortened +
rounded +
Holarrhenae +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
v--shaped +
1.8mm;5.2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex distique +
scabrous-angled +  and trigonous +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
Ont. +, Que. +  and Eurasia +
30–200 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Wet meadows, stream banks, disturbed areas +
2 cm20 mm <br />0.02 m <br /> (7 cm70 mm <br />0.07 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.18 cm1.8 mm <br />0.0018 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
sessile +  and veined +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.61 cm6.1 mm <br />0.0061 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
Fruiting Jun–Jul. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
adventitious +
staminate +  and pistillate +
reddish-brown +
basal +  and proximal +
ovate;acute;acuminate +
not differentiated +
cylindric +
Introduced +  and Illustrated +
0.4 cm4 mm <br />0.004 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
unisexual +  and androgynous +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sect. Distichae +
Carex disticha +
Carex sect. Holarrhenae +
species +
plant +  and not cespitose +