Carex cumulata

(L. H. Bailey) Mackenzie

Bull. Torrey Bot. Club 49: 366. 1923.

Common names: Carex dense
IllustratedEndemic
Basionyms: Carex straminea var. cumulata L. H. Bailey Mem. Torrey Bot. Club 1: 23. 1889
Treatment appears in FNA Volume 23. Mentioned on page 367.

Plants densely cespitose. Culms 20–80 cm; vegetative culms with leaf-blades in stiff rosettes. Leaves: sheaths adaxially green-veined nearly to collar, with a white-hyaline band or sharp Y-shaped hyaline region at collar; adaxially firm, summits truncate, prolonged 0.3 mm beyond collar, abaxially finely papillose; distal ligules 2–7 mm; blades 2–4 per fertile culm, 14–30 cm × 3–6 (–8) mm. Inflorescences dense or open, light green or brown, 1.5–4 (–5) cm × 7–16 mm; proximal internode 3–5 (–12) mm; 2d internode 2–9 mm; proximal bracts bristlelike or, sometimes, leaflike. Spikes 3–10, distant, distinct, conic or ovoid, 6–12 × 4–7 mm, base truncate or rounded, apex obtuse; staminate portion 2 mm or less. Pistillate scales white-hyaline or brown, with green or white midstripe extending to tip, broadly lanceolate, 2.8–3.5 mm, shorter and narrower than perigynia, apex firm, obtuse or acute. Perigynia appressed, greenish to dark-brown, conspicuously 3–7-veined abaxially, inconspicuously veined adaxially, obovate, concavo-convex, 3–4.2 × (1.8–) 2–3.2 mm, 0.5–0.7 mm thick, margin flat, including wing 0.5–0.8 mm wide; beak appressed-ascending, brown at tip, flat, ciliate-serrulate, abaxial suture with white or hyaline brown margin, distance from beak tip to achene 1.5–2 mm. Achenes elliptic, 1.7–1.9 × 1.1–1.25 mm, 0.5–0.6 mm thick; styles abaxially-adaxially bent. 2n = 36, 38.


Phenology: Fruiting mid–late summer.
Habitat: Dry to wet, acidic sandy, gravelly, or rocky soils of barrens, acidic woods and thickets, drying peat bogs, often associated with Polytrichum
Elevation: 0–300 m

Distribution

V23 647-distribution-map.jpg

Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Conn., Ill., Ind., Maine, Mass., Mich., N.H., N.J., N.Y., Pa., R.I., Vt., Wis.

Discussion

Carex cumulata is infrequent and seldom abundant in the habitats in which it is occurs. All reports of this species from Manitoba and extreme western Ontario, Canada are based upon historic collections made by John Macoun in 1872.

A few collecions appear to be sterile hybrids of Carex cumulata and C. scoparia. Carex cumulata and C. merritt-fernaldii sometimes occur together and frequently are mis-identified. Carex cumulata can be distinguished, however, by its adaxially green and veined sheaths, obovate perigynia and usually broader (3–6 mm) leaves.

Selected References

None.

Lower Taxa

None.

"less" is not a number."+timesaslongasinflorescences" is not declared as a valid unit of measurement for this property."not undefined" is not a number.

... more about "Carex cumulata"
biconvex +
smaller +
0.5mm +  and 0.6mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
(L. H. Bailey) Mackenzie +
shortened +
white-hyaline +
persistent +
rounded +  and truncate +
not enlarged +
Carex straminea var. cumulata +
ciliate-serrulate +
appressed-ascending +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
14 cm140 mm <br />0.14 m <br /> (30 cm300 mm <br />0.3 m <br />) +
2 (?) +  and 4 (?) +
v--shaped +
3mm;6mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
Carex dense +
fertile +  and vegetative +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (80 cm800 mm <br />0.8 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Man. +, N.B. +, Nfld. and Labr. +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Ill. +, Ind. +, Maine +, Mass. +, Mich. +, N.H. +, N.J. +, N.Y. +, Pa. +, R.I. +, Vt. +  and Wis. +
0–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry to wet, acidic sandy, gravelly, or rocky soils of barrens, acidic woods and thickets, drying peat bogs, often associated with Polytrichum +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
brown +  and light green +
0.2 cm2 mm <br />0.002 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
hyaline brown +  and white +
0.5mm +  and 0.8mm +
white +  and green +
with (1-)3-6(-30) bristles and/or scales +
veined +  and 3-7-veined +
greenish +  and dark-brown +
erect +  and spreading +
0.5mm +  and 0.7mm +
Fruiting mid–late summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
, +  and bristlelike +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Bull. Torrey Bot. Club +
y--shaped +  and sharp +
adventitious +
brown +  and white-hyaline +
basal +  and proximal +
lanceolate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
shorter and narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
distinct +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
ovoid;conic +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
prolonged +
papillose +
0.3 cm3 mm <br />0.003 m <br /> (?) +
Carex cumulata +
Carex sect. Ovales +
species +
plant +  and cespitose +