DESCRIPTION OF PLATES 
Plat^ XXIX. Fig. i,—A seedling of Hopi maize with mesocotyl 18 cm. long. The 
seed was planted in sand 20 cm. below the surface. There is a 
single seminal root with threadlike branches similar to those arising 
from the mesocotyl. The first nodal roots have begun to form at 
the base of the coleoptyle. One-half natural size. 
Fig. 2.—The root system of a plant of Zuni maize dug from a field 
near Zuni, N. Mex., showing the well-developed, single seminal root 
and the comparatively feeble nodal roots. Natural size. The field 
from which this plant was dug is shown in Plate XXXI, figure 1. 
XXX. Fig. i.-r—A hill of Hopi maize containing 15 plants grown under con¬ 
ditions of extreme drought at the base of the First Mesa near Polacca, 
Ariz. The ears can be seen borne at the surface of the ground. 
Fig. 2.—A plant of Hopi maize. One of the smaller plants from the 
hill shown in figure 1. The remains of the seed are scarcely visible 
at the sharp bend of the mesocotyl, 25 cm. below the surface of 
the ground. 
XXXI. Fig. 1.—A field of Zuni maize near Zuni, N. Mex. One of the hills 
near the center containing but a single plant shows a relatively 
large ear borne at the surface of the ground. 
Fig. 2.—A hill of Zuni maize in the field shown in figure 1. Note 
the large ears borne near the surface of the ground. 
Fig- 3 -—A hill of Hopi maize making luxuriant growth under condi¬ 
tions of extreme drought. Note the manner in which the low- 
spreading plants shade the ground. Polacca, Ariz. 
XXXII. Fig. 1.—A single plant of Navajo maize grown under irrigation at 
Shiprock, N. Mex. 
Fig. 2.—The basal portion of the plant of Navajo maize shown in 
figure 1, with leaves and husks removed. The ears from this plant 
after drying weighed 2 pounds. 
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