Variants of Carex aestivalis with larger perigynia have been collected from Virginia and North Carolina. Carex ... [details]

Occasional specimens with late-flowering stems have shorter, more crowded pistillate spikes and resemble the type ... [details]

Fruiting late spring–early summer. Dry to mesic grasslands, forest margins; 0–500 m.  [details]

Fruiting early–mid summer. Rare and local in dry meadows, grassy slopes, and prairies; of conservation concern; ... [details]

Fruiting late spring–early summer. Ditches, shores; 0–500 m. [details]

Fruiting late spring–mid summer. Cedar swamps, rich mesic deciduous or mixed conifer-hardwood forests, mixed ... [details]

Fruiting late spring–early summer. Dry open woods, neutral to acidic soils; 0–500 m. [details]

Fruiting early spring–summer. Hardwood forests on sand; 0–100 m. [details]

Glabrous forms are sporadic in the western part of the range and were recognized as Carex davisii forma glabrescens ... [details]

Carex debilis is extremely variable and has been variously subdivided into as many as six varieties or three ... [details]

Most specimens of Carex debilis var. debilis have glabrous perigynia, but those with pubescent perigynia occur ... [details]

Most collections of the northern variety, Carex debilis var. rudgei, have glabrous perigynia, but those with ... [details]

Carex formosa appears to be confined to areas with calcareous soils making it uncommon and sparsely distributed ... [details]

Two varieties of Carex gracillima have been named based on specimens with shorter stems, narrower leaves and ... [details]

Sporadic sterile hybrids between Carex gynodynama and C. mendocinensis are well documented. A reported hybrid with ... [details]

Fruiting late spring–early summer. Meadows, dry to mesic woods, neutral to basic soils; 100–500 m.  [details]

Fruiting late spring–early summer. Thickets, lowland forests, forested slopes; 0–1000 m.  [details]

Carex hirtissima often forms large populations in clear-cut areas, especially near seeps or springs. A completely ... [details]

Occasional sterile hybrids between Carex mendocinensis and C. gynodynama are found where the species grow together. ... [details]

Fruiting summer. Rock ledges, cliffs, balds in s Appalachians; 900–1900.  [details]

Plants with glabrous leaves and sheaths are occasionally found and have been treated as Carex oxylepis forma glabra ... [details]

Fruiting summer. Meadows, open slopes; 0–500 m.  [details]

Carex polymorpha, rare throughout its range, is of conservation concern (L. A. Standley and J. L. Dudley 1991).  [details]

Fruiting late spring–early summer. Dry to wet-mesic forests, scrub; 0–1000 m.  [details]

Carex venusta has been divided into two varieties: one with glabrous perigynia and slightly smaller perigynia and ... [details]

Fruiting summer. Dry, sandy and gravelly meadows, open forests; 1200–3400 m.  [details]

[Up] to 1600 m [details]

Fruiting summer [details]

Fruiting late spring–mid summer. [details]

Fruiting early–mid summer. [details]

Culms brownish at base, 30–90 cm. Leaves: sheaths glabrous; ligules 11–43(–53) mm; blades dark green, 10–40 ... [details]

Rhizomes 1–4 mm diam., tough, hard. Culms ridged, 10–70 cm × 0.5–2 mm, hard, without evident internal air ... [details]

Plants loosely cespitose. Rhizomes horizontal, slender, 1–3 mm thick. Culms (5–)10–45 cm × 1–2(–3) mm, ... [details]

Culms 100–200 cm × 5–15 mm. Leaves: sheaths reaching to middle of culm or higher, fronts convex (to concave) ... [details]

Culms to 150 cm × 1.5–3 mm. Leaves: sheaths reaching ± to middle of culm, fronts truncate to convex, membranous ... [details]

Herbs, annual, densely cespitose, scapose, low. Culms 5–20(–30) cm. Leaves to 2/3 length of scapes; sheaths ... [details]

Herbs, annual, cespitose. Culms to 30 cm, bases soft. Leaves spreading to ascending, ¼–1/3 length of scapes; ... [details]

Herbs, annual or perennial, cespitose, slender. Culms to 40 cm, wiry. Leaves ¼–1/2 length of culms; sheaths ... [details]

Herbs, annual, cespitose. Culms 10–20(–30) cm, bases soft. Leaves: sheaths with ascending-hirtellous ribs; ... [details]

Herbs, perennial (rarely annual), densely cespitose. Culms 15–40 cm. Leaves to 1/2 scape length; sheaths ... [details]

Herbs, annual, densely cespitose, scapose, delicate, low. Culms 5–10(–15) cm. Leaves 1/2 as long as to slightly ... [details]

Herbs, perennial, densely cespitose. Culms 10–30(–40) cm, bases hard, swollen. Leaves ¼–1/2 length of ... [details]

Herbs, annual, cespitose, diminutive. Culms at most to 7 cm. Leaves overtopping scapes; sheaths pale, shorter than ... [details]

Herbs, annual, densely cespitose, scapose. Culms (5–) 10–20 cm. Leaves 1/2–2/3 length of culms; sheaths ... [details]

Herbs, perennial, densely cespitose, scapose. Culms (10–)15–40(–50) cm. Leaves 1/2 length of culms; sheaths ... [details]

Plants not cespitose. Culms obtusely angled, 6–35 cm, glabrous. Leaves: basal sheaths brown; sheaths of proximal ... [details]

Plants cespitose. Culms 55–80 cm, distally slightly roughened. Leaves 3–4.5 mm wide. Inflorescences: peduncle ... [details]

Plants densely cespitose. Culms 18–66 cm. Leaves: sheaths adaxially white-hyaline, often tinged brown distally, ... [details]

Plants loosely or densely cespitose. Culms erect or ascending, 7–30 cm × 0.2–0.5 mm; vegetative shoots taller ... [details]

Plants densely cespitose; longer rhizomes internodes 0.2–6 mm, 1.2–2.2 mm thick. Culms purple-red to ... [details]

Plants colonial; rhizomes long-creeping. Culms central, coarse, trigonous, 55–130 cm, scabrous-angled. Leaves: ... [details]

Plants cespitose. Culms 20–35 cm, distally scabrous. Leaves blades 2–3 mm wide. Inflorescences: proximal bracts ... [details]

Plants densely cespitose. Culms 25–80 cm. Leaves: sheaths adaxially hyaline, often green-veined nearly to collar, ... [details]

Plants densely cespitose. Culms dark maroon at base; flowering stems 25–60 cm, usually longer than leaves at ... [details]

Plants without conspicuous rhizomes. Culms (20–)30–100 cm, 1.5–3.5 mm wide basally, 0.7–1.2 mm wide ... [details]

Plants densely cespitose. Culms 30–140 cm. Leaves: sheaths adaxially conspicuously green-veined nearly to collar, ... [details]

Plants densely to loosely cespitose; rhizomes ascending or horizontally spreading, reddish brown to dark reddish ... [details]

Rhizomes ascending to erect, 0–5(–30) mm. Staminate spikes 8.4–11.1 × 1–1.8 mm; staminate scales from ... [details]

Rhizomes horizontally spreading, 18–70 mm. Staminate spikes 6–14 × 0.5–1.8 mm; staminate scales 3–4 × ... [details]

Rhizomes ascending to erect, 0–5(–20) mm. Staminate spikes 5–8.5 × 0.8–1.3 mm; staminate scales from ... [details]

Plants densely cespitose. Culms 25–120 cm; vegetative culms inconspicuous with few leaves clustered at apex. ... [details]

Plants densely cespitose. Culms 10–30 cm, distally finely scabrous. Leaves 2.5–5 mm wide. Inflorescences: ... [details]

Culms densely tufted, lateral, ascending or lax to decumbent, distinctly winged, 10–62 cm × 2–2.4 mm; basal ... [details]

Culms to 90 cm × 2 mm, scabrous. Leaves: sheath fronts spotted red-brown, veinless, plane, apex truncate to ... [details]

Plants with basal sheaths of previous year persistent as linear fibers. Culms to 80 cm × 4 mm, scabrous. Leaves: ... [details]

Plants densely cespitose; rhizo1me internodes 1.2–2 mm thick. Culms dark purple-red to 0.3–2.4(–7.3) cm high ... [details]

Culms tinged reddish at base, 50–100(–130) cm. Leaves: sheaths ± hispidulous abaxially; ligules 3–30(–65) ... [details]

Culms to 75 cm × 2 mm, scabrous. Leaves: sheath fronts indistinctly spotted pale brown or red, apex convex, ... [details]

Plants not cespitose. Culms acutely angled, 15–90 cm, scabrous. Leaves: basal sheaths red-brown; sheaths of ... [details]

Plants not cespitose. Culms 20–150 cm. Leaves: basal sheaths red-brown or brown; sheaths of proximal leaves ... [details]

Culms 20–120 cm, angles glabrous. Leaves: basal sheaths leafless, usually red-brown; blades amphistomic, 2.5–8 ... [details]

Culms 35–150 cm, angles scabrous. Leaves: basal sheaths leafless, usually red-brown; blades epistomic, 5–18 mm ... [details]

Culms 35–100 cm, angles scabrous. Leaves: basal sheaths leafless, usually red-brown; blades amphistomic, 5-8 mm ... [details]

Culms 35–100 cm, angles glabrous or scabrous. Leaves: basal sheaths leafless, usually red-brown; blades ... [details]

Plants densely cespitose. Culms 20–30 cm. Leaves: sheaths white-hyaline, summits usually U-shaped; distal ligules ... [details]

Plants densely cespitose; rhizomes short. Culms erect, slender, 15–80 cm, very rough distally. Leaves: sheaths ... [details]

Plants densely cespitose. Culms dark maroon at base; flowering stems 20–100 cm, much longer than leaves at ... [details]

Plants densely cespitose, in large clumps; rhizomes short. Culms erect, strict, stoutish (2.5–4 mm at base), ... [details]

Plants loosely cespitose. Culms 30–100 cm. Leaves: sheaths papillose, summits U-shaped; distal ligules 3.5–5 mm; ... [details]

Plants without conspicuous rhizomes. Culms 15–60 cm, 1.4–2 mm wide basally, 0.7–0.9 mm wide distally. Leaves: ... [details]

Plants densely cespitose, also producing long-arching stolons that root at the tip and form new plants. Culms dark ... [details]

Culms hollow, ± spongy near base, trigonous in cross section, 35–125 cm; vegetative culms hollow, flattened when ... [details]

Plants densely cespitose. Culms (5–)20–80 cm. Leaves: sheath summits usually U-shaped, sometimes prolonged to ... [details]

Culms 10–110 cm. Leaves 3–5 per culm; sheaths tight, inner band hyaline, 3.5–24 cm, apex concave, glabrous; ... [details]

Plants loosely cespitose. Culms (10–)30–40(–60) cm, smooth. Leaves 3–5 mm wide. Inflorescences: proximal ... [details]

Plants loosely cespitose. Culms 20–70 cm, distally finely scabrous. Leaves 2.5–5 mm wide. Inflorescences: ... [details]

Plants loosely cespitose; rhizomes short, slender. Culms to 30(–60) cm. Leaves: blades 2–4 mm wide. ... [details]

Plants loosely cespitose. Culms 20–50 cm, distally scabrous. Leaves 3–5 mm wide. Inflorescences: proximal ... [details]

Culms 5–40 cm. Leaves: blades 3–20(–30) cm × 1.4–3 mm. Inflorescences: proximal bracts with well-developed ... [details]

Plants colonial, long-rhizomatous. Culms (10–)20–85 cm. Leaves 2–8.5 mm wide, sparingly scabrous. Spikes ... [details]

Plants without conspicuous rhizomes. Culms 20–90 cm, 1.5–3 mm wide basally, 0.9–1.1 mm wide distally. Leaves: ... [details]

Plants densely cespitose. Culms reclining or drooping, 19–51 cm × 0.2–0.7 mm. Leaves: basal sheaths purple; ... [details]

Plants densely to loosely cespitose; rhizomes short, no more than 10 cm. Culms sharply trigonous in cross section, ... [details]

Culms 15–40 cm. Proximal leaf blades 20–80 cm × 4–8 mm, smooth, glaucous and finely papillose abaxially, ... [details]

Plants not cespitose. Culms obtusely angled, 30–110 cm, glabrous. Leaves: basal sheaths brown; sheaths of ... [details]

Culms aphyllopodic, without dead leaf remains at base, 20–90 cm. Leaf blades 2–5 mm wide, margins revolute, ... [details]

Plants densely cespitose. Culms 20–90 cm; vegetative culms inconspicuous with few leaves clustered at apex. ... [details]

Plants cespitose. Culms 25–55 cm, proximally scabrous. Leaves 3–6 mm wide. Inflorescences: proximal bracts ... [details]

Plants cespitose with fewer than 25 culms per clump; rhizomes appearing elongate only in old clumps. Culms ... [details]

Culms erect or procumbent, to 20 cm. Leaves: blades 2–6 cm × 1–2.5 mm. Inflorescences: proximal bracts ... [details]