IN THE STTJBBLEB AND CULTIVATED FIELDS. 219 



times grows in the corn-fields, and more rarely the 

 Corn-bell Flower (Campanula Tiybrida) is seen therein. 

 The useful Fuller's Teazle (Dipsacus fullonum) , shows, 

 too, its prickly foliage and tall stem, and bears its 

 thistle-like oval head between the segments of the 

 calyx. The blue flowers appear between the hook- 

 like spines of the head, which are used for the raising 

 of the nap on cloth. The leaves clasp the stem so as 

 to form a water-cup. The Wild Teazle (Dipsacus 

 sylvestris) is common in the early autumn. Its leaves 

 are much smaller, and the head is nearly destitute of 

 the hooks which give such value to the fuller's teazle. 

 Occasionally the sharp spiky foliage and blue umbels 

 of the Field Eryngo (Eryngium ccmpestre) may be 

 found. In Northamptonshire it is called the Daneweed, 

 and was formerly common near Daventry and along 

 the "Watling Street road, but is now nearly extinct. 



