Johnsongrass

(Sorghum halpense)

 

State of Colorado ImageState of Colorado ImageState of Colorado ImageState of Colorado Image
© Steve Dewey
© Charles Bryson
© Ohio State University
© Chris Evans

Johnsongrass (Sorghum halpense) is a perennial grass native to the Mediterranean region. The erect stems of this grass grows to be 2 to 8 feet tall and they are generally solid. At the base of the stalks they are reddish pink in color. Leaves of this grass range from 6 to 20 inches long and are 1/2 to 1 inch wide. The blades are flat with a very distinctive white midvein with maturity. The ligules of the plant are membranous and are surrounded with fine hairs. The inflorescence of Johnsongrass are is a large open panicle, reddish to purple in color. The spikelets of the panicle are generally awn-tipped and shiny. Not all spikelets will contain awns, but the awns that are present can be bent and needle-like. Johnsongrass reproduces by seed and a thick fibrous rhizomes.

Johnsongrass Factsheet pdf file