IN EXTRA-TROPICAL COUNTRIES. 337 



Trifolium Alexandrinum, Linne.* 



The Bersin Clover. North-eastern Africa, South-western Asia, 

 South Europe. Much grown for forage in Egypt, where it is used 

 as the main fodder. On the Nile it gives three green crops during 

 the season, each up to 2 feet high. Seeds of this and other clovers 

 must be sifted to free them from the destructive Dodder-plants or 

 Cuscutas. About 20 Ibs. of seeds are required for an acre (Morton). 

 Recorded as annual. 



Trifolium Alpestre, Linne. 



Europe, West Asia. Perennial. Content with lighter soil than 

 that needed for most Clovers, but its constituents must be fairly 

 marly or limy. It is early out and very palatable (Langethal). 



Trifolium fragiferum, Linne. 



The Strawberry Clover. Europe, North Africa, Middle and North 

 Asia. A perennial species, well adapted for clay soils. Foliage 

 closer and more tender than that of the white clover, but its 

 vegetation later (iLangethal). Morton recommends it for moist 

 sandy soil. 



Trifolium hybridum, Linne.* 



The Alsike Clover. Europe, North Africa, Western Asia. A 

 valuable perennial pasture-herb, particularly for swampy localities. 

 It succeeds where the ground becomes too sandy for Lucerne and 

 too wet for Red Clover, but does not withstand drought so well, 

 while it produces a heavier bulk of forage than White Clover and 

 maintains its ground when such has become too much exhausted 

 for other Clovers. The seed being very small less than half the 

 quantity is required for the same area than of Red Clover. 



Trifolium incarnatum, Linne. 



The Carnation Clover, also called Crimson or Italian Clover 

 Middle and South Europe. Though annual only, or sometimeL 

 biennial, it is valued in some of the systems of rotations of crops. 

 In the South of England it is much sown on harrowed stubble 

 fields to obtain an early fodder of great fattening value. It forms 

 particularly a good fodder for sheep ; it is recommended especially 

 for gypsum regions. A white flowering variety exists. Bees are 

 very fond of it (Darwin). 



Trifolium medium, Linne.* 



The Red Zigzag Clover. Europe, North and Middle Asia. A deep- 

 rooting, wide-creeping perennial herb, much better adapted for dry- 

 sandy places than T. pratense. It would also endure the inclemency 

 of the clime of higher alpine regions if disseminated there. One of 



