Setaria

(Fertile lemma indurate, as opposed to soft in Pennisetum)

1. Plants > 1 m tall…2

1. Plants < 1 m tall…3

2. Panicle to 50 cm. Spikelets 2 mm…S. magna (can be huge, the stem multiple cm diam)

2. Panicle to 25 cm. Spikelets > 3 mm long…S. macrosperma (maritime species)

3. Bristles 1-3…4

3. Bristles 4-12…5

4. Bristle 1. Lemma smooth…S. verticillata (panicle 5-15 cm. Blades 5-10 mm wide)

4. Bristle 1-3. Lemma rugose…S. corrugata

5. Spikelets < 2.3 mm long. Panicle < 8 cm long…S. parviflora (native?)

5. Spikelets 3 mm. Panicles 3-15 cm long…S. pumila (native)