124 BOTANICAL GAZETTE [FEBRUARY 
typical of the bulk of the tobacco grownin Cuba. By far the greater 
part of the plants in the fields belong to this type, and differ from 
the particular strain here described only in minor details, such as 
shade of the flowers, length and breadth of the leaves, and height 
of the plants. These minor variations, however, seem to be trans- 
mitted with great fidelity in strains descended from a single plant. 
Cuban growers who saw the plats uniformly picked out such types 
as this and nos. 36 and 37 as Tabaco criollo, which signifies that 
it is the pure Cuban. The broad-leaved types, as well as the 
narrow-leaved forms mentioned farther on, were generally regarded 
with disfavor by the Cuban tobacco growers. From these facts it 
seems probable that this type represents the typical Cuban 
tobacco cultivated in the early history of the Island and known 
in horticulture as Nicotiana havanensis. 
Nos. 36 and 37 
These two forms are also typical Cuban forms and differ from 
no. 25 only in the width and length of the leaves. The difference 
in width of leaves of the different strains, while very slight, was still 
apparent when the plants stood in groups side by side. Too much 
stress should not be laid on differences of this nature unless accom- 
panied by other characteristics, or unless the differences can be 
clearly defined by plotting the variability curves. For all purposes, 
except those having in view the selection of superior strains, these 
types can be grouped with no. 25 as typical Cuban or Havana tobacco. 
No. r2: pl. V. fig. 4; pl. VII. fig. 8; pl. X. fig. 18 
No. 12 is a Cuban type, but differs from the foregoing forms in 
several ways, so that it was readily distinguished. The leaves were 
thicker, more rigid, and narrower than the other forms. In Cuba 
the leaves had a peculiar gray-green color which contrasted sharply 
with the neighboring plants. In Michigan this difference in color 
was less conspicuous, but all the plants of this type reacted alike 
as to the loss of color. The flowers are deep rose. On account of 
the stifiness of the leaves, their distance on the stem, and the small- 
ness of the upper ones, the plant has an open habit quite distinct 
from the larger-leaved types. 
