THE SWEET POTATO. 89 



Ihumai. Sandwich Islands. 

 Formula : 



Al B2 CI D4 E2 Fl Gl H3 14 Jl K3. 



Stems not much longer than 4 feet, extremely thick, sometimes 

 measuring over V^ inch in diameter at the thickest point. Very 

 dark purple. 



Star extending half-way up the veins or farther, bright. Under 

 side of veins brilliantly set off in purple in younger opened leaves. 



Hair absent from surface of the leaf, present only at the edge. 



Type leaf Fig. 33. 



India Red India. 



Formula : 



A3 B2 CI Dl El Fl Gl H2 14 Jl K. 



Stems long, whitish-green, with pinkish-purple blotches around 

 the axils of the leaves and occasionally in other places; thin, only 

 rarely over % inch in diameter. 



Star large, bright red. 



Type leaf Fig. 44; largest leaves over 4 inches across, but most 

 full-grown leaves are 3-4 inches across. 



Hair scattered along the larger veins. 



The young leaves, just opened, are characteristically colored 

 pinkish-brown. 



John Burnet. (True Parson Prince). Jamaica. 



Formula : 



Al B2 CI D2 E2 Fl Gl H2 12 J2 K3. 



Stems little over 4 feet, -^ inch thick, green, with purple marks 

 around the axils of the leaves and purple sunburns on the upper 

 surface, where exposed. 



Star small, but plain. Lower surface of veins well marked with 

 purple, out to the margin of the leaf. 



Leaf like type Fig. 30, not cordate at the base. Hair rather far 

 down the central lobe, and along larger veins. 



Large leaves, about 5 inches across from tip to tip. 



Latex very abundant. 



