glumes are herbaceous and not at all indurated. They 
are typical of certain types of pod-corn involving lower 
alleles at the pod-corn locus in combination with 7%, a 
major tunicate-inhibiting gene (see Mangelsdorf 1974). 
There is only one known modern Chilean race, Polulo, 
to which these slender cobs can be assigned. This is a 
finger-shaped popcorn with 10-16 kernel rows, grown at 
approximately 2700 meters. Its glumes are soft, the 
rachillae long and slender. 
Timothy et a/. state that the race Polulo seems not to 
be duplicated among collections made in other South 
American countries, but there seems to us a possibility 
that it is related to the Peruvian popcorn race Confite 
Morocho. Indeed one of the ears of Polulo illustrated 
in figure 5 of Timothy et al. resembles rather closely one 
of the ears of Confite Morocho illustrated in figure 48 of 
Grobman et a/. (1961). Both have about the same length, 
9.1 and 8.5 cm. respectively; both have 10 kernel rows 
and their rows are slightly irregular. One of the most 
distinctive characteristics of the archaeological specimens 
is their peduncles, which have about the same diameters 
as the rachises. The data of Grobman ect al. show that 
this is true of Confite Morocho. 
Galinat (1969) has isolated from the Peruvian race 
Confite Morocho types with cobs so slender that he calls 
them ‘‘string cobs.” These slender cobs are found also 
in the Peruvian race Rabo de Zorro, which Grobman 
et al, regard as a hybrid derivative of Confite Morocho. 
Moulds thought to represent ears of Rabo de Zorro occur 
on a number of ceramic vessels of the Moche culture 
(Early Intermediate Period); several of these are illus- 
trated in Grobman et al. (figs. 81 and 82), and one in 
Mangelsdorf (1974, fig. 17.18). These show that this 
slender-cob trait in South American races is an ancient 
one. The fact that it is not known in Mexican races may 
[ 57 
