234 Flarshberger—aA Study of the Fertile Hybrids 
the kernels are larger, more rounded and more floury, 
while the corneous cucullate depression of the rhachis has 
become smaller and more saucer-like (Fig. 3). The kernels 
of this generation are usually arranged ina distichous manner. 
The third year, pollen of Indian corn is again used, and the 
resulting ears are found to differ by the increase of the num- 
ber of rows of grains, four or more being found; the pithy 
axis (cob) now becomes demarcated, and is seen when the ear 
is broken across (Figs. 4 and 5). The plants of this genera- 
tion and the fourth (Figs. 6, 7 and 8) are identical with those 
described by Professor Watson and myself.! 
The cross thus established between teosinté and maize may 
be represented as follows : 
Euchlena mexicana Schrad. 2 X Zea maysL. & = Zea can- 
tna Watson, the “ maiz de coyote,” or “ maiz de los gentiles” 
of the Mexicans. 
Before closing, it is important to refer to two interesting 
facts. The hybrids described above are known widely through- 
out Mexico. Dr. Carl Lumholz found ears identical with 
those of the hybrids among the timid Tarahumara Indians of 
northern central Mexico, who, in their mountain fastnesses, 
come little in contact with white men. Dr. Nicolas Leon also 
informs me that the hybrids are grown by the. Mixes and 
Zapotecs inhabiting the State of Oaxaca, and that there the 
plant is quite common. 
Corn smut (Ustilago ze@) also occurs on the hybrids 
especially those of the fourth generation, as so clearly shown 
in the photograph (Fig. 9). 
CONCLUSIONS. 
With these interesting hybrids before him, one is tempted to 
theorize. Is Zea mays a true species, or is it a cultivated race 
1 A very fair but reduced illustration of the ears of the fourth hybrid generation 
is to be found in my monograph.—Bot. Contrib., Univ. Penn., I, plate xv, fig. 9. 
