Produced by Crossing Teosinté and Maize. 233 
results obtained, that the plants which Sereno Watson 
described as Zea canina, and which were afterward carefully 
studied by the writer, are identical with the hybrids which Pro- 
fessor Segura obtained at the Agricultural School of Mexico. 
Teosinté, Euchlena mexicana, Schrad., is a plant of several 
varieties native to Mexico, where the writer found it growing 
in the Barranca Chica, near Guadalajara. It is grownasa 
fodder plant in most warm countries, seldom flowering when 
planted in Europe. The two-ranked ears are clustered in the 
axils of the leaves, and have one fertile and one rudimentary 
flower placed in a hardened cup-shaped depression of the rhachis, 
the lower coriaceous glume closing the mouth of the hood 
formed by the rhachis (Plate XXII, Fig. 1a.). The male spike, 
terminally borne, consists of two flowered spikelets, with three 
stamens in each flower. The female spikelet has two flowers, 
one perfect, and one anterior and abortive flower. When maize 
is crossed with teosinté by the use of maize pollen, the hybrid 
progeny of the first generation is intermediate and shows a 
much shortened branch in the axil of a leaf with three or four 
ears clustered together, and surrounded on the outside by 
leaves, which are usually termed husks (Fig. 2). These 
hybrid ears resemble in a number of particulars those of 
teosinté in that they are two ranked with the kernels in the 
hardened depression of an enlarged zigzag rhachis, which 
shows the beginning of a cob-like axis, on which in 
this case the grains are disposed in a distichous manner (Fig. 
1). The kernels of this hybrid generation are larger, sharp- 
pointed and protrude between the scales (glumes) from the cup- 
shaped depression of the axis, which is inthis case shallower 
than in teosinté. The outer glume, which is hard in teosinté, 
becomes larger and softer in the hybrid progeny. The axis 
is still firm, glossy and chitinous. In the second year maize 
pollen is again used, to cross with the hybrid plants of the first 
generation. The result of this cross is a form of ear in which 
