Carex aggregata

Mackenzie

Bull. Torrey Bot. Club37: 246. 1910

Synonyms: Carex sparganioides aggregata
Basionyms: Carex agglomerata
Found in FNA Volume 23. Mentioned on page 296.
FNA23 P81 Carex gravida pg 296.jpeg
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

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.

References

None.

Facts about "Carex aggregata"
AuthorPeter W. Ball +
BasionymCarex agglomerata +
Elevation50–300 m +
HabitatMeadows, thickets, open forests, usually on calcareous soils +
IllustratorSusan A. Reznicek +
PhenologyFruiting late spring. +
ReferenceNone +
SynonymCarex sparganioides aggregata +
Taxon nameCarex aggregata +
Taxon parentCarex sect. Phaestoglochin +
Taxon rankspecies +
VolumeVolume 23 +