PuateE XLVI 
alt 
i 
f) 5 
B¥s 
dé 
v Av 
JORaOEBAL 
DOLOHDOOOOHOHOHOCa’ 
IILII IMI IIIA 
HHOHDHNHOOHDOHVOTE 
(DOE 
VOOURDEE 
ale 
IOUOVOVONHHE 
, WC 
Z XZ ZZ) ZZXZ) 
A pictorial and symbolic representation of the new hypothesis suggesting that 
Tripsacum, XZ, may have originated as an amphidiploid hybrid between Mani- 
suris, X, and wild maize, Z, of the type illustrated here by the reconstructed 
prehistoric wild maize from Tehuacain, Mexico. Teosinte, Z(XZ), and modern 
maize, Z(ZXZ), would, on this same notation, represent two different evolved 
products involving Manisuris introgression into maize. 
Drawn by Wavtron C. Gatinat 
