6 BULLETIN 1021, U. S. DEPARTMENT OF AGRICULTURE. 



In giving the names of the varieties it would be desirable to con- 

 sider priority of nomenclature, but it is not possible to establish 

 priority. In most cases it has not been possible to determine when, 

 where, and by whom a name was given ; therefore it has been deemed 

 advisable to select the name that is in most general use. It is real- 

 ized that growers in some sections will feel that some of the names 

 used in this bulletin are not the correct ones. Growers in Viriginia 

 may insist that the name Hayman should have been used instead of 

 Southern Queen, but the latter name is more common in all other 

 sweet-potato growing regions. The name Nansemond is more com- 

 mon than Yellow Jersey in Virginia, but the latter name is much 

 more common in all other regions where this variety is grown. The 

 same may be said of all other names selected to designate the impor- 

 tant varieties. Some varieties are grown to such a limited extent 

 that there is not much chance for confusion. 



KEY TO THE GROUPS. 



I. Leaves deeply Iobed or parted — 1 and 2. 



(1) Leaves with purple stain at the base of the leaf blades. 



Ticotea, page 6. 



(2) Leaves without purple stain at the base of the leaf blades. 



Belmont, page 7. 



II. Leaves not -deeply lobed or parted — 1 and 2. 



(1) Leaves with purple stain at the base of the leaf bladeS-A and B. 



(A) Stems purple or greenish with decided tinge Spanish, page S. 



(B) Stems — a and b. 



(a) Leaves entirely to slightly shouldered; roots white. 



Shanghai, page S. 



(b) Leaves toothed with 6 to 10 low marginal teeth, or 

 entire; roots salmon or yellow tinged with salmon. 



Florida, page 9. 



(2) Leaves without purple stain at the base of the blade or with 

 very faint stain — A and B. 



(A) Stems purple Southern Queen, page 0. 



(B) Stems green — a and 6. 



(a) Stems medium to large in size; roots fusiform, yellow 

 tinged with salmon, with light yellow veins__PuMPKiN, page 0. 



(6) Stem slender; roots russet yellow or red, ovoid to fusi- 

 form Jersey, page 10. 



DESCRIPTIONS OF THE GROUPS. 



In the descriptions of the groups an effort has been made to give 

 the characteristics of the vines and roots of the entire group and 

 not that of any particular variety; in fact, the group description 

 has been made from the descriptions of the varieties belonging to 

 the group. 



TICOTEA GROUP. 



Vines long, 6 to 12 feet, or short and stocky ; stems green in color or with a 

 tinge, of purple at the nodes, nearly smooth; leaves very angular in outline, 

 5 to 7 lobed ; blade hairy only on the veins of the upper surface, green except 



