126 BOTANICAL GAZETTE [FEBRUARY 
_auricles. Inflorescence loose, open. Limb of the corolla deeply 
lobed, with ovate or triangularly acuminate lobes. Color pale 
rose to deep rose. In Michigan the form retained the same dwarf 
habit, with the large leaves on the lower part of the stem. The 
only difference was that the plants grew more vigorously and had 
larger leaves in the northern habitat. Types like this and no. 32 
differ very conspicuously from the other members of the havanensis 
group, and it is possible that they belong to other species. 
Conclusion 
The tobacco grown in Cuba consists of a mixture of a large 
number of forms which maintain their characters from generation 
to generation. Pure strains, breeding true to type, can readily be 
selected from this mixture. When such pure strains are grown in 
northern climates, they do not break up into a number of new types, 
but the plants of each strain remain uniform. Such modifications 
as appear, appear alike in all the plants of a given strain 
BurEAU OF PLant INDUSTRY 
WasHINcTON, D.C. 
