Carex trichocarpa

Willdenow

Sp. Pl. 4(1): 302. 1805.

Common names: Carex à fruits velus
IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 499. Mentioned on page 493, 497, 500.

Culms trigonous in cross-section, 40–120 cm; vegetative culms hard, solid with parenchyma, taller than fertile culms. Leaves: basal sheaths reddish purple, inner bands fibrillose with age; sheaths with apex of inner band strongly reddish purple-tinged, thickened, especially on distal sheaths, thickened portion opaque, smooth, glossy, essentially veinless at apex, not ladder-fibrillose, glabrous; ligules 3–12.5 mm; blades 2.5–8.8 mm wide, glabrous, not papillose abaxially. Inflorescences 13–50 (–60) cm; spikes erect or ascending; proximal 2–4 (–6) spikes pistillate; terminal 1–8 spikes staminate (rarely gynaecandrous). Pistillate scales lanceolate to narrowly ovate, apex acute to acuminate, scabrous-awned, glabrous. Staminate scales lanceolate to narrowly ovate, apex obtuse to acuminate, occasionally scabrous-awned, glabrous. Perigynia 12–22-veined, (5.3–) 6–11.5 × (1.7–) 2.1–3.9 mm, sparsely to densely pubescent (very rarely glabrous); beak 2.1–4.4 mm, pubescent, teeth straight to spreading, (1–) 1.2–2.3 (–2.8) mm.


Phenology: Fruiting May–Jul.
Habitat: Openings in bottomlands, marshes, wet meadows, wet thickets along streams and rivers, wet prairies along streams, rarely occurring far from streams
Elevation: 50–900 m

Distribution

V23 929-distribution-map.jpg

Ont., Que., Conn., Del., Ill., Ind., Iowa, Md., Mass., Mich., Minn., Mo., N.J., N.Y., N.C., Ohio, Pa., Tenn., Vt., Va., W.Va., Wis.

Discussion

Carex trichocarpa is quite uncommon in large portions of its range (E. L. Core 1968).

Carex trichocarpa rarely hybridizes with C. atherodes, C. lacustris (P. M. Catling et al. 1989), and C. pellita (C. ×caesariensis Mackenzie, according to A. A. Reznicek and P. M. Catling 1985). Hybrids of C. trichocarpa with C. laeviconica are uncommon in the zone of overlap of these two species (D. Castaner and A. A. Reznicek 1988); one collection of that hybrid is known from Nebraska, although C. trichocarpa has not yet been recorded from the state (S. Rolfsmeier and B. Wilson 1997). A single collection with glabrous perigynia has been seen.

Selected References

None.

Lower Taxa

None.

"taller" is not a number."less" is not a number.

... more about "Carex trichocarpa"
trigonous +
smaller +
pubescent +  and glabrous +
reddish purple-tinged +
A. A. Reznicek +  and Paul M. Catling +
Willdenow +
shortened +
rounded +
bidentate +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
papillose +
m-shaped +  and flat +
2.5mm;8.8mm +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex à fruits velus +
redbrown +  and brown +
fertile +  and vegetative +
trigonous +
40 cm400 mm <br />0.4 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
acute +  and short-awned +
Ont. +, Que. +, Conn. +, Del. +, Ill. +, Ind. +, Iowa +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
50–900 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Openings in bottomlands, marshes, wet meadows, wet thickets along streams and rivers, wet prairies along streams, rarely occurring far from streams +
50 cm500 mm <br />0.5 m <br /> (60 cm600 mm <br />0.6 m <br />) +
13 cm130 mm <br />0.13 m <br /> (50 cm500 mm <br />0.5 m <br />) +
staminate +, prophyllate +, pedunculate +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
0.3 cm3 mm <br />0.003 m <br /> (1.25 cm12.5 mm <br />0.0125 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
0.53 cm5.3 mm <br />0.0053 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.15 cm11.5 mm <br />0.0115 m <br />) +
0.21 cm2.1 mm <br />0.0021 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
Fruiting May–Jul. +
2-3(-4)-carpellate +
not ladder-fibrillose +  and veinless +
3 (?) +  and 1 (?) +
adventitious +
staminate +  and pistillate +
basal +  and proximal +
lanceolate;narrowly ovate +
shorter or longer +
cylindric +
0 cm0 mm <br />0 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
Illustrated +  and Endemic +
staminate +  and pistillate +
ascending +  and erect +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
persistent +
2-3(-4)-fid +
Carex trichocarpa +
Carex sect. Carex +
species +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
straight +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
plant +  and cespitose +