WEATHERWAX: MORPHOLOGY OF FLOWERS OF ZEA Mays 135 
The male and female parts of this aborted flower make about 
equal development, the stamens being about as well developed as 
those of the functional female flower, and the pistil resembling 
that in the normal male flower. The lodicules are also present 
and pretty well developed (FIG. 9). 
Sturtevant (12) reports that he found on one occasion 
an ear of pod corn that had the kernels ‘twinned in the pods.”’ 
In several ears grown from seed furnished by Professor M. L. 
Fisher, of Purdue University, I have found a few pods each of 
which had two grains (Fic. 12). Examination of these shows that 
both flowers of a spikelet have developed. Kempton (14, pp. 8 
and 9) reports the same occurrence in a few spikelets of a variety 
of corn grown by the Hopi Indians of Arizona and adds that the 
lower flower in several varieties occasionally develops, sometimes 
accompanied by the abortion of the upper flower. In the summer 
of 1914, while preparing material for study, I found that the 
variety of sweet corn known as Country Gentleman regularly 
has both flowers of the female spikelet functional. Stewart (13) 
has recently reported an observation of the same kind. 
In this variety, then, two grains are produced where there 
is only one in most other varieties, and the ear has practically 
the double number of grains. On account of this the grains are 
so much crowded that they become long and slender (Fic. 13) 
and are thrown out of line so as to appear to be no longer arranged 
in rows (FIG. 14). Kempton (14, p. 8) speaks of one variety of 
sweet corn that shows an exception to the usual rowed arrange- 
ment of the grains, but he attributes the irregularity to an in- 
discriminate arrangement of the spikelets. The variety is not 
named, but, even to the “shoe peg” type of grain produced, it 
might be “Country Gentleman,” except for the arrangement of 
the spikelets. I have found no variety of corn in which the 
spikelets were not arranged in rows on the cob. 
In appearance and structure this functional lower flow 
es Country Gentleman” sweet corn is similar to the upper one, 
it is often somewhat smaller and slower to mature (TEXT FIG. 4)- 
With reference to their position on the cob as an axis, the arrange- 
ment of the parts of this flower is, as might be expected, the exact 
Opposite of that of the upper flower. This causes the stigma to 
er of 
but 
