Common Name: foxtail, yellow
Species: Setaria glauca (L.) Beauv.
Bayer Code: SETLU

Yellow foxtail is a bright green clumping annual or perennial weed common in turf and pasture areas. The seedhead can be distinguished from that of green foxtail because it is thicker, and has shorter bristles. Giant foxtail has the largest seedhead of the three and this seedhead is drooping. In addition, yellow foxtail has hairs on the leaf margins and ligule. Knotroot foxtail is a perennial weed that is very similar in appearance to yellow foxtail, but it has rhizomes whereas yellow foxtail does not.
yellow foxtail
[Click on image to view plant details]
sea of yellow foxtail
yellow foxtail
giant, green and yellow foxtail seedheads
yellow foxtail seedheads
Page 
 
CharacteristicTypeDescription
Seedhead / Flower spikeseedhead a coarse spike, several bristles on one seed
Vernation Type rolledleaves rolled in the bud
Ligule Type fringe of hairsdense fringe of hairs, 0.04 inches (1 mm) long
Growth Season / Life Cycle summer annual weed OR perennial weed 
Auricle Type absent 
Leaf Blade Tip Shape sharp-pointedlong hairs on upper surface
Leaf Blade Width  up to 0.47 inches (12 mm) wide
Stolon Presence absent 
Rhizome Presence absent 
Collar Type continuous 
Sheath Margin split with overlapping marginsedges not hairy
Sheath Type flattenedsharply creased