THE SWEET POTATO. 95 



Hair plentiful along the veins, rarely between the veins, except 

 at the tip. 



The young open leaves are typically purplish, with the veins darker 

 purple on the upper surface. 



Type leaf Fig. 39. 



Southern Queen, Strong type. 



(Miles Yam, Hayman, Archer's Hybrid, Gold Coin, Florida Bunch, 

 Florida, Brazilian, Florida Yam No. 2, Gold Skin, Caroline Lee, 

 Yellow Bean, Polo, Hamburg.) 



Formula: 



A4 B2 CI D3 E2 F2 G2 H2 11-2 J2 K2. 



Stems long, ys-V* inch thick, greenish-brown to purple. 

 Midrib of old leaves, e52>eeially such as have purplish petioles, is 

 often pinkish below. 



Leaf often 5-6 inches in its widest diameter. 

 Hair chiefly along the veins. 

 Type leaf Fig. 58. 



Southern Queen. Weak type. 



(Early Golden, McCoy, White Yam, Kentucky W^hite, General 

 Grant, Up River, Pierson.) 



Formula : 



A4 Bl CI D3 El-2 F2 G2 H2 11-2 J2 K2. 



Leaves sometimes over 4 inches, but usually 3 inches in diameter. 

 Otherwise like the strong type of Southern Queen. 

 Type leaf Fig. 56. 



Thompson's Favorite. (Jamaica). 

 Formula : 



A3 Bl-2 C2 D4 E2 Fl Gl H2 II Jl K2. 



Stems short, rarely over 18 inches, ^ inch thick or thicker, dark 

 purple. 



Star very large and striking, running up the veins in thick 

 purple lines. Lower surface of veins purple. All older petioles are 

 entirely dark purple. Hair scant on the tip and along the veins. 



Type leaf Fig. 43. 



]\Iost leaves are less than 4 inches across, but some measure more 

 than 4 inches. 



