Green bristle grass

Setaria viridis


Annual loose tuft-forming grass which prefers light soils in warmer locations. The growing of game cover crops may increase the occurrence of this species.


Plants 16-60 cm in height, nodes often reddish. Stems are smooth with a hollow centre. The spikelets are single-blossomed bearing rough bristles.

Ligule: Transformed into a crown of hairs 3 mm in length.

Auricle: Absent.

Leaf blade: Hairless, 3-30 cm in length and 4-10 mm wide. The youngest leaf rolled, leaf sheaths nearly hairless.

Green bristle 1Green bristle grass
Green bristle - youngGreen bristle grass young plant
Green bristle - matureGreen bristle grass flower head