THE ANCESTOR OF CORN—MANGELSDORF 507 
set the plant upon new evolutionary paths that have made it more 
useful to man and more dependent upon him for survival. 
REFERENCES 
1. O. T. BonNETT, The inflorescences of maize. Science, vol. 120, pp. 77-87, 1954; 
P. WEATHERWAX, Structure and development of reproductive organs [of 
corn]. Jn Corn and Corn Improvement. New York, 1955. 
2. P. C. MANGELSDORF, Corn. Jn Encyclopaedia Britannica, 1958. 
3. E. S. BarcHoorn, M. K. Wo.Lre, and K. H. Cuiissy, Fossil maize from the 
Valley of Mexico. Botanical Museum Harvard Univ. Leafl. No. 16, pp. 
229-240, 1954. 
4. P. C. MANGELSDORF, New evidence on the origin and ancestry of maize. 
Amer. Antiq., vol. 19, pp. 409-410, 1954. 
5. P. C. MANGELSDORF and C. EH. SmiruH, Jr., New archaeological evidence on 
evolution in maize. Botanical Museum Harvard Univ. Leafl. No. 13, pp. 
213-247, 1949. 
6. P. C. MANGELSDORF and R. G. ReEeEveEs, The origin of Indian corn and its 
relatives. Texas Agr. Exp. Stat. Bull. No. 574, 1939. 
7. P. WEATHERWAX, Indian corn in Old America. New York, 1954; P. WEATHER- 
wax and L. F. RANDOLPH, History and origin of corn. Jn Corn and Corn 
Improvement. New York, 1955. 
8. P. C. MANGELSpDoRF, R. 8S. MAcNEISH, and W. C. GaLinat, Archaeological evi- 
dence on the diffusion and evolution of maize in northeastern Mexico. 
Botanical Museum Harvard Univ. Leafl. No. 17, pp. 125-150, 1956. 
9. EH. J. WELLHAUSEN, L. M. Roperts, and EH. HERNANDEZ, in collaboration with 
P. C. Mangelsdorf, Races of maize in Mexico. Bussey Institution, Har- 
vard Univ., 1952. 
10. L. M. Roperts, U. J. GRANT, R. RAMIREZ, W. H. HATHEWAY, and D. L. SmirH, 
in collaboration with P. C. Mangelsdorf, Races of maize in Colombia. Nat. 
Acad. Sci., Nat. Res. Counce. Publ. No. 510, 1957. 
11. W. C. Garinat, P. C. MANGELSDORF, and L. Pierson, Estimates of teosinte 
introgression in archaeological maize. Botanical Museum Harvard Univ. 
Leafl. No. 17, pp. 101-124, 1956; P. C. MANncEtsporr and R. L. Lister, 
Archaeological evidence on the evolution of maize in northwestern Mexico. 
Botanical Museum Harvard Univ. Leafi. No. 17, pp. 151-177, 1956. 
