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 yellow-brown 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"
Robert F. C. Naczi +  and Charles T. Bryson +
Bryson Kral & Manhart +
Griseae +
Ala. +, Miss. +, N.C. +  and S.C. +
60–200 m +
Mesic deciduous forests, usually on gentle slopes above small streams in ravines, usually in shallow loams and sandy loams over clays +
Fruiting spring. +
Carex sect. Oligocarpae +
Carex impressinervia +
Carex sect. Griseae +
species +