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Key to Piptochaetium

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1 Lemma 8.0-10.1 mm long (including the callus but not the awn); spikelets 9.7-13 mm long (excluding the awn); awns 4.0-7.5 cm long; [widespread in our area]
1 Lemma 12.4-18.2 mm long (including the callus but not the awn; spikelets 17.8-20.3 mm long (excluding the awn); awns 62-120 mm long; [endemic to FL]