University of Missouri Extension

IPM1007, Revised November 2009

Practical Weed Science for the Field Scout: Corn and Soybean

Dogbane, hemp (Apocynum cannabinum)

Perennial broadleaf

Hemp dogbane Hemp dogbane
 

Hemp dogbane

A perennial that resembles a milkweed with opposite leaves that secrete a milky sap when broken. Leaves are ovate or elliptic in outline, as much as 1.5 inches wide by 5 inches long, and are arranged oppositely along the stem. Stems reach 5 to 6 feet in height, branch especially in the upper portions of the plant, and often have a reddish tint when mature. The seedpods are long and narrow and usually turn reddish brown and split open when mature to expose the seed with long white silky hairs. Flowers occur in inconspicuous clusters and are greenish white in color.
 

IPM1007, revised November 2009

Wild thing
 

IPM1007 Practical Weed Science for the Field Scout: Corn and Soybean | University of Missouri Extension

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