Setaria italica is an annual, C4 grass (Downton 1971), much like S. viridis but coarser.
Leaves 0.5-3 cm wide.
Flower spikelets 0.3 cm, fertile lemma smooth, shining, bristles green, brown, or purplish, grain dropping free of glumes inflorescence spike wider, 10-30 cm long, 0.7-3.5 cm wide, appearing densely shallow-lobed, tip often nodding.
Wetland status: NL.
Frequency in NYC: Very infrequent.
Origin: Old World.
Habitat: An old and once a widely cultivated form of S. viridis, with many cultivars (Hitchcock 1950). Open habitats, roadsides.