Quackgrass

Image courtesy of the slide collection of Jack Harper.

Image courtesy of the slide collection of Jack Harper.

Rhizomes. Image courtesy of Matthew Naedel.

Rhizomes. Image courtesy of Matthew Naedel.

Hairy sheath and clasping auricles. Image courtesy of Matthew Naedel.

Hairy sheath and clasping auricles. Image courtesy of Matthew Naedel.

Image courtesy of Matthew Naedel.

Rhizomes. Image courtesy of Jeffery Borger.

Mother and daughter plants. Image courtesy of Larry Kuhns.