Carex ouachitana

Kral Manhart & Bryson

Ann. Missouri Bot. Gard. 74: 440, fig. 1. 1987.

Treatment appears in FNA Volume 23. Treatment on page 451. Mentioned on page 448, 450.

Plants not cespitose; rhizome internodes 2–3.4 mm thick. Culms strongly purple-red or yellowbrown tinged with purple-red to 4.8–10.4 cm high at base, 20–60 (–68) cm. Leaves: sheaths glabrous; blades green, widest blades 2.4–5.1 (–6.7) mm wide, smooth abaxially. Inflorescences 0.21–0.57 (–0.95) of culm height; peduncles of lateral spikes scaberulous; peduncles of terminal spikes (2.5–) 18–121 mm, usually much exceeding lateral spikes; proximal bract with sheaths tight, abaxially glabrous, sheath front apex concave, elongated 0.2–2.5 mm; ligules 0.2–4.3 mm; distal bract shorter than terminal spike. Spikes 1–3, widely separate; lateral spikes pistillate or androgynous, with 3–13 (–22) perigynia, (19–) 13–39 × 3.9–8.3 mm, ratio of spike length (in mm) to flower number = 1.7–3.4; terminal spikes (16–) 20–43 × (2.8–) 3.3–4.5 (–5.4) mm. Pistillate scales 3.3–11.1 (–17.9) × 2–2.8 mm, margins entire, whitish, apex with awn 0.2–8.3 (–13.7) mm. Staminate scales 4.2–5.7 × 1.2–1.6 mm. Anthers 2.4–4.4 mm. Perigynia spirally imbricate, 42–65-veined, unwrinkled, obovoid or narrowly obovoid, obtusely triangular in cross-section, 3.4–5.1 × 1.5–2 mm, 1.8–2.5 (–3.2) times as long as wide, dull, base gradually tapered, apex gradually or abruptly tapered to subacute; beak absent or excurved, 0–0.4 (–1.2) mm. Achenes obovoid, 2.6–3.4 × 1.4–1.8 mm, tightly enveloped by perigynia; stipe 0.1–0.3 (–0.6) mm, bent 30–60°; beak bent 35–80°, 0.25–0.45 mm.


Phenology: Fruiting spring.
Habitat: Mesic to dry-mesic, rocky, deciduous or deciduous-pine forests, usually in loams on slopes or ridgetops
Elevation: 200–800 m

Discussion

Though it has a restricted distribution and is local, Carex ouachitana is often abundant where it occurs.

Selected References

None.

Lower Taxa

None.

"high" is not a number.

... more about "Carex ouachitana"
0.26 cm2.6 mm <br />0.0026 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
smaller +
1.4mm;1.8mm +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
Robert F. C. Naczi +  and Charles T. Bryson +
Kral Manhart & Bryson +
0.83 cm8.3 mm <br />0.0083 m <br /> (1.37 cm13.7 mm <br />0.0137 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.83 cm8.3 mm <br />0.0083 m <br />) +
shortened +
tapered +
Griseae +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
straight +
bent +  and excurved +
0.025 cm0.25 mm <br />2.5e-4 m <br /> (0.045 cm0.45 mm <br />4.5e-4 m <br />) +
m--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
yellowbrown tinged +  and purple-red +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
Ark. +, Ky. +, Okla. +  and Tenn. +
200–800 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
1.7 +  and 3.4 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
biconvex +  and trigonous +
Mesic to dry-mesic, rocky, deciduous or deciduous-pine forests, usually in loams on slopes or ridgetops +
0.21 +  and 0.57 +
1.9 cm19 mm <br />0.019 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
yellowbrown +  and dark-brown +
1.8-2.5(-3.2) +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.51 cm5.1 mm <br />0.0051 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Fruiting spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
Ann. Missouri Bot. Gard. +
0.2 cm2 mm <br />0.002 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
adventitious +
staminate +  and pistillate +
1.11 cm11.1 mm <br />0.0111 m <br /> (1.79 cm17.9 mm <br />0.0179 m <br />) +
0.42 cm4.2 mm <br />0.0042 m <br /> (0.57 cm5.7 mm <br />0.0057 m <br />) +
basal +  and proximal +
2-keeled +
1.2mm;1.6mm +
cylindric +
0.25 cm2.5 mm <br />0.0025 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (12.1 cm121 mm <br />0.121 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.03 cm0.3 mm <br />3.0e-4 m <br /> (?) +
deciduous +
2-3(-4)-fid +
Carex sect. Oligocarpae +
Carex ouachitana +
Carex sect. Griseae +
species +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.54 cm5.4 mm <br />0.0054 m <br />) +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
plant +  and not cespitose +
2.4mm +  and 5.1mm +