Setaria gracilis.inflorescence and bristles.Dr. Gerald D. Carr.botany.hawaii.edu (Accessed 3/2017)

Setaria is a genus of annual or perennial, C4 grasses; stems usually in tufts.

Leaves mostly along stems, various.

Setaria pumila.floret with bristles.Copyright © by ActaPlantarum 2007-2014.actaplantarum.org (Accessed 4/2016).

Flower spikelets swollen, shiny, with a single fertile floret, lower floret sterile; outer scale of the fertile floret (lemma) often textured with small wavy ridges (rugulose); each spikelet subtended by 1-numerous bristles, these persistent after spikelet is shed; inflorescence appearing spike-like, but with many very short branches (a dense panicle).