198 CAPP ARID ACE AE (CAPER FAMILY) 



Although it produces seed in plenty, the worst part of this weed 

 is underground ; it springs from a small tuber about the size of a 

 kernel of corn, attached to a slender rootstock on which there are 

 other tubers, all of which will send up new plants during the present 

 or the coming spring. Cows sometimes eat of the plant when first 

 turned out to graze in spring, seeming to relish 

 its pungent, bitter taste, the taint of which 

 is communicated to the milk. (Fig. 140.) 



Stem very slender, smooth, six inches to a 

 foot in height. Base leaves about an inch 

 broad, nearly circular or sometimes heart- 

 shaped, smooth, entire, with long, slender 

 petioles ; those on the stem broadly lance- 

 shaped, sessile, often entire, others slightly 

 toothed. Flowers in rather large, loose clus- 

 ters at the top of the stalk, white, and about 

 a half -inch broad. Siliques about an inch 

 long, flattened, very slim, tapering at each 

 end, nearly erect. 



Means of control 



Cleanse infested grass lands with better 

 drainage, for if they lack moisture the tubers 

 will die. Plants of brooksides and ditches 



should be cut with hoe or scythe in the 



FIG. 140. Bulbous . .. , ,., , . , . 



Cress (Cardamine but- spring, if they are likely to come within 

 bosa). x i. reach of grazing milch cattle. 



CLAMMYWEED 

 Polanisia graveolans, Raf . 



Other English names: Clammy Clover, Stinking Clover. 



Native. Annual. Propagates by seeds. 



Time of bloom: June to August. 



Seed-time : Late July to October. 



Range: Quebec to the Northwest Territory, southward to Mary- 

 land, Tennessee, and Colorado. 



Habitat: Sandy or gravelly soil; shores of streams and lakes, road 

 embankments, moist, sandy fields. 



