100 THE CLOVERS— RED AND COWGRASS. 



confounded with one known commonly in Great Bri- 

 tain and Ireland under the name of Cowgrass) — and 

 (b) Trifolium pratense (Linn.), var. sativum. 



Though of the two varieties the latter is capable of the 

 greatest development, yet the former is most durable ; and, 

 being endowed in a larger degree with capacity to adapt 

 itself to variations of climate and of soil, a crop from it 

 can be depended upon under conditions where the suc- 

 cess of the latter would be doubtful. Nevertheless it is 

 not always easy to distinguish one of those varieties 

 from the other ; and, if the two varieties are cultivated 

 together in the same field for some years, they do not 

 in the end present any points of difference, and become 

 of equal value. 



The values of Eed Clovers derived from different 

 countries vary a good deal. 



American Bed, which is largely imported of late years, 

 gives a yield about equal to that of the average of 

 European Eeds, but is less robust than they, and con- 

 sequently offers less resistance to the variations of 

 temperature and of humidity. Some interesting obser- 

 vations made at Copenhagen showed that the severe 

 winter of 1878-79 killed three plants of the American 

 Clover for one of European parentage. In milder win- 

 ters the American Clover does not appear to suffer iu 

 any greater degree than the others. 



English and Swiss Red excel all others in regard to 

 durability, size, and robustness of plant. 



Styrian and Silesian Eed rank next after English 

 and Swiss in respect to the qualities mentioned. 



French Bed has neither the size nor robustness of the 

 preceding, and is more delicate every way. 



Italian Bed is very early, and germinates well, but 



