Carex hookeriana

Dewey

Amer. J. Sci. Arts 29: 248, plate X, fig. 75. 1836.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 290. Mentioned on page 286, 287, 291.

Plants without conspicuous rhizomes. Culms 15–80 cm, 1.5–2 mm wide basally, 0.5 mm wide distally. Leaves: sheaths tight, green, fronts white-hyaline; ligules less than 2 mm, wider than long; widest leaf-blades 1.5–2.5 mm wide. Inflorescences with 5–10 spikes, 2–5 cm × 5–10 mm; proximal internodes 1–2 times as long as proximal spikes; proximal bracts 1–2 cm; spikes with 5–10 erect perigynia. Pistillate scales brown with green midvein, ovate, 2.7–3.6 × 1.4–2.1 mm, body longer and wider than perigynium, apex awned. Anthers not measured. Perigynia pale green to pale-brown, veinless or obscurely veined abaxially, 2.6–3.5 × 1.2–1.5 mm, margins serrulate distally; beak 0.8–1.5 mm, apical teeth 0.3–0.5 mm. Achenes elliptic-circular, 1.5–1.7 × 1.1–1.2 mm.


Phenology: Fruiting late spring–early summer.
Habitat: Swamps, mesic to wet-mesic grasslands and open forests
Elevation: 300–500 m

Distribution

V23 495-distribution-map.jpg

Alta., Man., Ont., Sask., N.Dak., S.Dak.

Discussion

Carex hookeriana was collected once in Ontario along Lake Superior’s north shore, but its status in Ontario is unclear.

Selected References

None.

Lower Taxa

None.

"longer and wider" is not a number.

... more about "Carex hookeriana"
0.15 cm1.5 mm <br />0.0015 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
biconvex +
smaller +
1.1mm;1.2mm +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Peter W. Ball +
shortened +
white-hyaline +, hyaline +  and narrow +
red tinged +  and brown +
rounded +
bidentate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
v--shaped +
0mm;20mm +
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 /> (80 cm800 mm <br />0.8 m <br />) +
0.5;1.5mm;2mm +
Alta. +, Man. +, Ont. +, Sask. +, N.Dak. +  and S.Dak. +
300–500 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
white-hyaline +
biconvex +  and trigonous +
Swamps, mesic to wet-mesic grasslands and open forests +
, +  and racemose +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
wider than long +
with (1-)3-6(-30) bristles and/or scales +
veined +  and veinless +
pale green +  and pale-brown +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1-2 times as long as proximal spikes +
Amer. J. Sci. Arts +
adventitious +
0.27 cm2.7 mm <br />0.0027 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
basal +  and proximal +
1.4mm;2.1mm +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex hookeriana +
Carex sect. Phaestoglochin +
species +
rhizomatous +  and short-rhizomatous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +