82 FARM WEEDS OF CANADA 



the difference being entirely due to the presence of Stinkweed 

 in the one case and to its having been harrowed out in the other. 



Running the disc or harrow over stubble immediately after 

 the binder, so as to start into growth the seeds near the surface, 

 gives good results. The following spring, harrow or cultivate 

 these plants down as soon as a fresh growth starts, then plow and 

 harrow at once. This land may be sown late to a green feed 

 crop, or it may be kept under a clean fallow for the whole season 

 if the land can be spared. The following spring any plants 

 that appear should be cultivated before sowing the crop. An 

 excellent plan, which will enable the farmer to take a rest in 

 this fight, is to seed down with timothy or western rye grass. 

 Such fields require mowing occasionally during the season to 

 prevent seeds ripening. The grass will choke out even the 

 Stinkweed after the first year. When the sod is plowed up again 

 some seeds may still be vital, but these can be dealt with as 

 before. 



PEPPERGRASS (Lepidium apetahmi Willd.) 



Other Latin name : Lepidium intermedium Gray. 



Native. Annual and winter annual. Stems erect, pro- 

 fusely branching above, 6 inches to 2 feet high, somewhat hoary 

 with short appressed hairs. Autumn plants produce a rosette 

 of dark-green, deeply indented leaves, much like some specimens 

 of Shepherd's Purse but more succulent. Stem-leaves with 

 a few coarse teeth, narrowed at the base. The many nearly 

 erect and spreading branches give this plant, when in seed, 

 the appearance of a miniature tree, the numerous, small, nearly 

 round, flat pods taking the place of leaves; the real leaves fall 

 away when the seeds begin to ripen. The flowers are minute; 

 the seed-pods about 1/10 of an inch wide, heart-shaped, 

 slightly longer than wide, notched at the top and at maturity 

 separate into halves. 



