Testing Farm Seeds. 



361 



imported seed. The plants grow chiefly in moist places and are not trouble- 

 son^ on uplands. 



Lady's-thumb seeds (fig. 19, k) are usually free from the chafify covering, 

 and are then black, shining, broadly oval, and flattened, or sometimes 3-angled;. 

 common in various kinds of farm seeds, particularly American-grown red clover 



3(^. 



Fig. 19. — Other weed seeds commonly found in farm seeds (No. 1) : a. Crab-grass; 

 b, witch-grass; c, yellow foxtail; d, green foxtail; e, velvet grass; f, soft chess; 

 S, sedge; h, sorrel; i, knotweed ; j, pale knotweed ; k, lady's-thumb; 1, lamb's- 

 quarters ; m, wild saltbush ; n, rough amaranth ; o, spreading amaranth ; p, wild 

 spurry ; q and r, chickweed ; s, mouse-ear chickweed ; t, forked catchfly. (En- 

 larged and natural size.) 



seed. The habit of the plant is similar to that of the preceding knotweeds, to 

 which it is closely related. This plant is common on dry uplands. 



Lamb's-quarters (goosefoot) seeds (fig. 19, 1) are small, lens shaped, dark 

 brown, or black and shining, sometimes found within a chafify covering of five 



