Carex ruthii

Mackenzie in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 18: 112. 1931.

IllustratedEndemic
Synonyms: Carex muricata var. ruthii (Mackenzie) Gleason
Treatment appears in FNA Volume 23. Treatment on page 329. Mentioned on page 326, 328.

Culms (23–) 30–100 cm. Leaves 3–7 per culm; sheaths tight, inner band hyaline or straw colored, 6–18 cm, apex concave, glabrous; ligules rounded, 1–2.5 mm; blades plicate, 30–70 cm × 1.6–5 mm, widest leaf (2.6–) 2.9–5 mm wide. Inflorescences (2.2–) 3–8.5 cm; spikes 3–8; lateral spikes 3.6–11.2 mm, sessile, pistillate or gynecandrous, staminate portion 2-flowered, to 1 mm, pistillate portion 6–28-flowered, 3.6–11.2 mm; basal 2 spikes (5–) 10–40 mm apart; terminal spike 7–15.5 mm, gynecandrous with staminate portion 3–14-flowered, 2–11 (–14) × 0.8–1.6 mm and pistillate portion 10–25-flowered, 4.1–8 × 6.1–7.7 mm. Pistillate scales ovate, 1.4–2.2 × 1.1–2 mm, apex obtuse to acute. Staminate scales narrowly ovate, 1.6–2.4 × 1.1–1.9 mm, apex obtuse to acute. Anthers 0.8–1.45 mm. Perigynia spreading to reflexed, olive green, 6–14-veined abaxially, 0–5-veined adaxially, broadly to narrowly ovate, (2.8–) 3–4.4 × 1.3–1.9 (–2.1) mm, (1.6–) 1.8–2.5 times as long as wide; beak 0.9–1.75 mm, 0.43–0.85 length of body, serrulate, teeth 0.15–0.35 mm. Achenes ovate, 1.1–1.8 × 0.9–1.4 mm.


Phenology: Fruiting late spring–early summer.
Habitat: Boggy meadows, open or wooded stream banks, springheads, seeps
Elevation: 700–1900 m

Distribution

V23 584-distribution-map.jpg

Ga., N.C., S.C., Tenn., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Carex ruthii"
0.11 cm1.1 mm <br />0.0011 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
much smaller +
0.9mm;1.4mm +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.145 cm1.45 mm <br />0.00145 m <br />) +
A. A. Reznicek +
Mackenzie in N. L. Britton et al. +
shortened +
white-hyaline +, hyaline +  and narrow +
rounded +  and cordate +
0.43 length of body;0.85 length of body +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.175 cm1.75 mm <br />0.00175 m <br />) +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
inconspicuous +
v--shaped +
1.6mm;5mm +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
0.8mm +  and 5mm +
round +  and trigonous +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Ga. +, N.C. +, S.C. +, Tenn. +  and Va. +
700–1900 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Boggy meadows, open or wooded stream banks, springheads, seeps +
2.2 cm22 mm <br />0.022 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
straw colored +  and hyaline +
6 cm60 mm <br />0.06 m <br /> (18 cm180 mm <br />0.18 m <br />) +
pistillate +  and sessile +
0.36 cm3.6 mm <br />0.0036 m <br /> (1.12 cm11.2 mm <br />0.0112 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0-5-veined +  and 6-14-veined +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
(1.6-)1.8-2.5 +
0.3 cm3 mm <br />0.003 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
spreading +  and reflexed +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
Fruiting late spring–early summer. +
2-3(-4)-carpellate +
10-25-flowered +, pistillate +, 3-14-flowered +, staminate +, 6-28-flowered +  and 2-flowered +
0.41 cm4.1 mm <br />0.0041 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.36 cm3.6 mm <br />0.0036 m <br /> (1.12 cm11.2 mm <br />0.0112 m <br />) +
0.61 cm6.1 mm <br />0.0061 m <br /> (0.77 cm7.7 mm <br />0.0077 m <br />) +
3 (?) +  and 1 (?) +
in N. L. Britton et al., N. Amer. Fl. +
adventitious +
staminate +  and pistillate +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
basal +  and proximal +
ovate;ovate +
1.1mm;1.9mm +
cylindric +
Illustrated +  and Endemic +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex muricata var. ruthii +
Carex ruthii +
Carex sect. Stellulatae +
species +
staminate +  and pistillate +
1.1 cm11 mm <br />0.011 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.55 cm15.5 mm <br />0.0155 m <br />) +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
0.015 cm0.15 mm <br />1.5e-4 m <br /> (0.035 cm0.35 mm <br />3.5e-4 m <br />) +
plant +  and cespitose +
2.9mm +  and 5mm +