Carex aggregata

Mackenzie

Bull. Torrey Bot. Club 37: 246. 1910.

IllustratedEndemic
Basionym: Carex agglomerata Mackenzie Bull. Torrey Bot. Club 33: 442. 1906,
Synonyms: Carex sparganioides var. aggregata (Mackenzie) Gleason
Treatment appears in FNA Volume 23. Mentioned on page 296.

Plants without conspicuous rhizomes. Culms (20–) 30–100 cm, 1.5–3.5 mm wide basally, 0.7–1.2 mm wide distally. Leaves: sheaths usually loose, proximal green-and-white-striped and green-and-white-mottled, with conspicous transverse veins on back, fronts white to hyaline, sometimes red dotted and transversely rugose, yellow or brown and thickened at mouth; ligules 1–4.5 mm, shorter than to as long as wide; widest leaf-blades 3.5–5 mm wide. Inflorescences with 5–10 spikes, (1.5–) 2–5 cm × 8–13 mm; proximal internodes shorter than to as long as proximal spikes; proximal bracts to 3 cm; spikes with 5–15 ascending to spreading perigynia. Pistillate scales hyaline or pale-brown with green, 1–3-veined center, ovate, 2.2–3.5 × 1.2–1.8 mm, body 2/3 as long to almost length of perigynia, apex acuminate to short-awned. Anthers 1.5–2.5 mm. Perigynia pale green to pale-brown, veinless or weakly 2–5-veined abaxially, 3.4–4.6 × 1.9–2.8 mm, body somewhat spongy, thickened at base, margins serrulate distally; beak 0.7–1.4 mm, apical teeth 0.3–1 mm. Achenes circular to elliptic-circular, 1.8–2.1 × 1.6–1.8 mm.


Phenology: Fruiting late spring.
Habitat: Meadows, thickets, open forests, usually on calcareous soils
Elevation: 50–300 m

Distribution

V23 513-distribution-map.jpg

Ont., Ala., Del., D.C., Ill., Ind., Iowa, Ky., Md., Minn., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.Dak., Tenn., Va., W.Va., Wis.

Discussion

Carex aggregata may be difficult to distinguish from C. gravida if the leaf sheaths are damaged or not visible on specimens.

Selected References

None.

Lower Taxa

None.

"acuminate" is not a number.

... more about "Carex aggregata"
circular +  and elliptic-circular +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
biconvex +
smaller +
1.6mm;1.8mm +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Peter W. Ball +
Mackenzie +
shortened +
white-hyaline +, hyaline +  and narrow +
red tinged +  and brown +
rounded +
Carex agglomerata +
bidentate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
round +  and trigonous +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
0.7mm;1.2mm +
Ont. +, Ala. +, Del. +, D.C. +, Ill. +, Ind. +, Iowa +, Ky. +, Md. +, Minn. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, S.Dak. +, Tenn. +, Va. +, W.Va. +  and Wis. +
50–300 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
brown +, yellow +, red dotted +, white +  and hyaline +
biconvex +  and trigonous +
Meadows, thickets, open forests, usually on calcareous soils +
, +  and racemose +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
shorter than to as-long-as wide +
0.1 cm1 mm <br />0.001 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
2-5-veined +  and veinless +
pale green +  and pale-brown +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
ascending +  and spreading +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
Fruiting late spring. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
green-and-white-striped and green-and-white-mottled +
Bull. Torrey Bot. Club +
adventitious +
pale-brown with green +  and hyaline +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex sparganioides var. aggregata +
Carex aggregata +
Carex sect. Phaestoglochin +
species +
conspicous +
rhizomatous +  and short-rhizomatous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +