Prare I. A and B. Two views of a segment of a 
disarticulating “‘tripsacoid’’ cob from the 24-36” 
level. The pedicellate member of each pair of spike- 
lets is staminate. The kernels have brown pericarp 
and are almost completely enclosed by the glumes. 
With respect to the pistillate spikelets, this is a 
four-rowed ear. C. Tripsacoid cob from the 36-48” 
level showing highly indurated tissues of the rachis. 
Approximately half of the pistillate spikelets are 
solitary. D. This specimen appears to be the pis- 
tillate basal part of a tassel branch or an un- 
branched tassel. E. A tripsacoid cob from the 36- 
48” level showing highly indurated tissues of the 
rachis, a whorled phyllotaxy, and a solitary spike- 
let. F. Fragment of a cob from the 36-48” level 
showing the almost square shaped cupules which 
are similar to those of the prehistoric wild corn 
from Tehuacan Valley. All photos * 3.7. 
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