Carex impressinervia

Bryson Kral & Manhart

Rhodora 89: 357, figs. 1, 2. 1987.

Treatment appears in FNA Volume 23. Treatment on page 451. Mentioned on page 448, 450, 452.

Plants densely cespitose; rhizome internodes 1.8–2.5 mm thick. Culms yellowbrown at base, 25–85 cm. Leaves: sheaths glabrous; blades green, widest blades 2.6–4 mm wide, smooth abaxially or midrib antrorsely scaberulous. Inflorescences 0.37–0.72 of culm height; peduncles of lateral spike barely scaberulous; peduncles of terminal spikes (0.5–) 1.9–6.6 (–8.9) cm, usually much exceeding lateral spikes; proximal bract sheath tight, abaxially glabrous, apex slightly concave; ligules 0.4–1.8 (–3.6) mm; distal bract slightly shorter than to slightly overlapping, not exceeding terminal spike. Spikes 3–5, widely separate; lateral spikes pistillate or androgynous, with 5–11 perigynia, 11–43 × 3.9–8.6 mm, ratio of spike length (in mm) to flower number = 3–6.1; terminal spikes (19–) 23–31 (–40) × 2.5–3 (–3.3) mm. Pistillate scales 3.3–6.6 × 1.6–1.9 mm, margins whitish, entire, apex with awn 0.2–3.7 mm. Staminate scales 4.5–6.8 × 1–1.3 mm. Anthers 2.8–3.8 mm. Perigynia spirally imbricate or separate, 40–49-veined, unwrinkled, obovoid or narrowly obovoid, obtusely triangular in cross-section, 4.1–5 (–5.5) × 1.6–1.8 mm, 2.4–2.9 (–3.4) times as long as wide, dull, base gradually tapered, apex gradually or abruptly tapered to subacute; beak absent or excurved, to 0.4 (–0.7) mm. Achenes obovoid, 3.1–3.5 × 1.5–1.8 mm, tightly enveloped by perigynia; stipe bent 5–30°, 0.4–0.7 mm; beak bent 30–60°, 0.2–0.4 mm.


Phenology: Fruiting spring.
Habitat: Mesic deciduous forests, usually on gentle slopes above small streams in ravines, usually in shallow loams and sandy loams over clays
Elevation: 60–200 m

Discussion

Of conservation concern.

Very rare and local, Carex impressinervia is known from only fifteen populations.

Selected References

None.

Lower Taxa

None.
... more about "Carex impressinervia"
0.31 cm3.1 mm <br />0.0031 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
smaller +
1.5mm;1.8mm +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
Robert F. C. Naczi +  and Charles T. Bryson +
Bryson Kral & Manhart +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.37 cm3.7 mm <br />0.0037 m <br />) +
shortened +
tapered +
Griseae +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
straight +
bent +  and excurved +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-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 +
round +  and trigonous +
25 cm250 mm <br />0.25 m <br /> (85 cm850 mm <br />0.85 m <br />) +
slightly shorter than to slightly overlapping +
Ala. +, Miss. +, N.C. +  and S.C. +
60–200 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
3 +  and 6.1 +
biconvex +  and trigonous +
Mesic deciduous forests, usually on gentle slopes above small streams in ravines, usually in shallow loams and sandy loams over clays +
0.37 +  and 0.72 +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
separate +  and imbricate +
0.5 cm5 mm <br />0.005 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
yellowbrown +  and dark-brown +
2.4-2.9(-3.4) +
0.41 cm4.1 mm <br />0.0041 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
Fruiting spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
adventitious +
staminate +  and pistillate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.68 cm6.8 mm <br />0.0068 m <br />) +
basal +  and proximal +
2-keeled +
1mm;1.3mm +
cylindric +
6.6 cm66 mm <br />0.066 m <br /> (8.9 cm89 mm <br />0.089 m <br />) +
1.9 cm19 mm <br />0.019 m <br /> (6.6 cm66 mm <br />0.066 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (?) +  and 0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +
deciduous +
2-3(-4)-fid +
Carex sect. Oligocarpae +
Carex impressinervia +
Carex sect. Griseae +
species +
3.1 cm31 mm <br />0.031 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
plant +  and cespitose +
2.6mm +  and 4mm +