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Carex Group 1
See list of 19 species in this group-
1a. Basal leaf sheaths anthocyanic; stigmas trifid
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2a. Leaf blades 2.5–6 mm wide, flat; plants colonial from long rhizomes (in part)
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2b. Leaf blades 1–3 mm wide, V-shaped in cross-section; plants cespitose, with short rhizomes (in part)
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1b. Basal leaf sheaths not tinged with anthocyanic pigments; stigmas bifid
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3a. Spike 1 per stem
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4a. Stems 5–20 cm tall, produced singly or few together from long, slender rhizomes; leaf blades 0.3–0.7 mm wide (in part)
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4b. Stems 12–70 cm tall, cespitose; widest leaf blades 0.8–1.5 mm wide (in part)
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3b. Spikes normally 2 or more per stem
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5a. Widest leaf blades 4–8 mm wide; anthers 4–6.5 mm long; inflorescences 10–20 mm wide (in part)
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5b. Widest leaf blades 1–3 (–3.5) mm wide; anthers (1–) 1.2–3.9 mm long; inflorescences 3–12 (–14) mm wide
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6a. Spikes 5–18 (–25) per stem; stems produced singly on long rhizomes (in part)
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6b. Spikes 2–8 per stem; stems cespitose
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7a. Ligules 0.3–1.7 mm long; anthers (1–) 1.2–2.2 (–2.3) mm long; staminate scales 2.2–3.3 mm long (in part)
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7b. Ligules 1–3.5 mm long; anthers 1.7–2.9 mm long; staminate scales 2.8–3.9 mm long (in part)
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Each photo represents one species in this subgroup.