Bul. 1021, U. S. Dept. of Agriculture. 



Plate V. 



American Varieties of Sweet Potatoes. II. 



Pig. 1. — Young and old foliage of Yellow Strasburg. Fig. 2. — Triumph, a repre- 

 sentative of the Spanish group, Spanish section ; a heavy yielder of roots 

 that are often very irregular. Pig. 3. — Porto Rico, a representative of the 

 Spanish group, Bermuda section. Pig. 4. — Foliage of Porto Rico, one of the 

 best varieties. 



