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Cinna
See list of 2 species in this genus-
1a. Second (i.e., upper) glume 1-veined, 2.6–4.1 mm long, with wide, scarious margins, each scarious margin constituting nearly 25% of the total width of the glume; anthers 0.5–0.8 mm long; branches of the panicle spreading to drooping; lemma awn 0.1–2.5 mm long, commonly longer than 0.5 mm; leaf blades 6–25 cm long; palea with 2 closely spaced nerves (less frequently with only 1 nerve)
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1b. Second glume 3-veined, 4.1–6.6 mm long, with narrow, scarious margins; anthers 0.8–1.8 mm long; branches of the panicle ascending to spreading; lemma awn 0.2–1.5 mm long, commonly shorter than 0.5 mm; leaf blades 15–40 cm long; palea with 1 nerve
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Each photo represents one species in this genus.