Large Crabgrass: Digitaria sanguinalis
Stems: Prostrate, spreading, branched, and rooting at the nodes.
Roots: Fibrous root system.
Flowers: Seed head composed of 4-6 branches (spikes) at the top of stems, each approximately 1 1/2 to 7 inches long. Spikelets are elliptic and in two rows along the spike.
Seed: Shiny, yellowish-brown, 2-3 mm long.