68 COMMON WEEDS 



south and east of England. It is under a foot high, 

 with sessile oblong-lanceolate leaves, white, reddish, or 

 purplish flowers J inch in diameter, and very small, 

 broad, flat pods. The flowers appear about July. Where 

 this weed occurs plentifully, it should be met by sur- 

 face cultivation and the vigorous use of the hoe. 



Wart Cress, Swine's Cress (Senebiera Coronopus 

 Poiret.) is an annual or biennial weed of cultivated 

 ground, roadsides, and waste land. It is a small, 

 smooth, leafy plant, with many slender prostrate 

 branches. The minute white flowers are in very short 

 clusters opposite the leaves, and, with the small com- 

 pressed pods, give the plant the appearance of being 

 " warty." Flowering takes place between June and 

 September. This weed must where necessary be 

 hoed out. It is unlikely to be very troublesome, but 

 occurs sometimes in cornfields. 



VIOLACE.E 



Heart's-ease, Corn Pansy (Viola tricolor L. and sub. 

 sp.) is chiefly a weed of arable and waste land. It is 

 a very variable annual, with angular branched stem 

 6 to 1 8 inches high, and well-known, pretty flowers J to 

 ij inch in diameter. It has a long flowering period, 

 from May to September, and is perhaps most common 

 in cornfields. The seeds occur in samples of timothy, 

 alsike, and other farm seeds. Persistent hoeing of 

 root crops after corn, with surface cultivation if the 

 pest is plentiful, will reduce it ; and, as it seeds freely, 

 it must not be permitted to ripen its seed capsules. 



