98 THE SWEET POTATO. 



White Gilk. Southern States and West Indies. 



= (W. Gilkes, 3 months.) 

 (W. Gilkes, 6 months.) 



Formula : 



Al B2 CI D2 E2 Fl Gl H2 II Jl K3. 



Stems not much longer than 4 feet, fg inch thick, greeii', with 

 purplish spots around the axils of the leaves and in other places. 



Star conspicuous, veins strongly marked with purple on the under 

 surface. Hair scattered along veins and on the tip. 



Type leaf Fig. 29. 



Differs from John Burnet in having the star smaller in the young 

 leaves and larger in the old ones. 



White Sealy. Louisiana and West Indies. 



Formula : 



A2 B2 CI Dl E2 F2 G4 H2 II J2 K3. 



Stems long, thick, green, no purple on entire plant. 



Type leaf omitted by mistake. 



Hair scattered along midrib and principal veins. 



Yellow Colombia. 



Formula : 



A4 Bl( ?) CI D3 EI-2 Fl G4 H2 12 J2-3 KI. 



(Plants not old enough to be certain about all the measurements.) 

 See description of \^Tiite Colombia. 

 Type leaf Fig. 54. 



Yellow Jersey. (Big Stem Jersey). Washington, D. C. 



Formula : 



A5 Bl CI Dl El F2 G3 HI 12 J3 Kl. 



Stems long, less than % inch in diameter, light green. 

 Purple spot under side of the base of the midrib. 

 Type leaf Fig. 67. 



