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Andropogon
See list of 3 species in this genusReference: Campbell (2003).
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1a. Sessile spikelets 5–11 mm long; pedicellate spikelets usually well-developed and staminate
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1b. Sessile spikelets (2.6–) 3–5 mm long; pedicellate spikelets usually reduced or absent, often only the pedicel present
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2a. Leaves with scabrous sheaths, the blades (13–) 30–109 cm long; ligules 0.6–2.2 mm long; mature peduncles of the rames (4–) 11–35 (–60) mm long
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2b. Leaves with smooth sheaths, the blades 11–30 (–52) cm long; ligules 0.2–1 mm long; mature peduncles of the rames (2–) 3–4 (–10) mm long
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Each photo represents one species in this genus.