MINNESOTA WEEDS, SERIES III 13 



Eradication. — Smartweed is not a troublesome weed in well-culti- 

 vated fields where the soil is in good condition. It yields readily to 

 cultivation. Mow frequently to prevent seeding. Drain the land if 

 low and wet. Keep the land occupied by other crops. 



Swamp Dock (Rumex verticillatiis L.) 



Description.— Swamp dock, like curled dock, is a perennial but is 

 not so widely distributed over the state as curled dock. It always 

 grows in wet, swampy places, flowering from May to July and seeding 

 from August to November. The leaves are narrowly oblong and of a 

 pale greenish color. The lower leaves are often heart-shaped at the 

 base. The plant has a stout grooved stem, and grows from two to 

 five feet high. The reddish brown triangular seeds are very seldom 

 found in commercial seed, appearing occasionally however, in the 

 seed of red clover. 



Eradication. — Remove stray plants of swamp dock by spudding or 

 spading out. Drain and subdue the low land or swamps. Plow and 

 crop the land and swamp dock will disappear. 



Maple-Leaved Goosefoot (Chenopodium hybridum L.) 



Description. — Maple-leaved goosefoot is an annual plant, flowering 

 from July to September and seeding from August to November. It 

 grows from two to five feet tall and is found most commonly in 

 woods, thickets, and shady places, altho it is sometimes found along 

 roadsides and in waste places. The thin leaves are small, triangular 

 in shape, and resemble those of the common maple. The seeds re- 

 semble those of lamb's quarters, described in Series I, 2 but are larger 

 and more uniform in shape. The seeds are often found in alfalfa, 

 red clover, and timothy, and to some extent in alsike and millet. 



2 Oswald, W. L. and Boss, Andrew. Minnesota weeds series I. Minn. Agr. Exp. Sta. 

 Bull. 129. 1913. 



