Key to Clustered Round or Oval Millet-like Grass Spikelets

About a dozen species of Arizona grasses are common and have round or oval millet-like seeds (spikelets). Here are some common millet-like grasses:

Hopia obtusa Vine Mesquite Clustered Oval Spikelets	Sorghum halepense Johnson Grass Large Clustered Ovals	Zuloagaea bulbosa Bulbous Panicgrass Panicle of Oval Spikelets
Echinochloa muricata American Barnyard Grass Oval Spikelets	Eriochloa contracta Prairie Cupgrass Oval Spikelets	Blepharoneuron tricholepis Hairy Dropseed Oval Spikelets
Setaria macrostachya Plains Bristlegrass Oval Spikelets