Leafy Spurge is an erect perennial up to 3' in height. spreading by seed or roots. Leaves are alternate, long, narrow, 1/4" wide and 2" long.
Stems are hairless, contain a milky sap and branch at the top. True flowers are surrounded by large heart shaped floral leaves which turn yellow-green.
Roots are deep spreading, persistant, brown in color with numerous pink buds.
Photos and information adapted from "Weeds of the West" by Tom Whitson