24 CORN CROPS 



Zea Mays curagua. Characterized by a serrate leaf 

 edge. Probably a flint type. 



Chinese maize. A small-eared type resembling pearl 

 pop corn, but characterized by a softer, opaque endo- 

 sperm. Not starchy. A tendency for the upper leaves 

 to be on one side of the plant. (See Bur. Plant Indus., 

 Bui. 161.) 



Hermaphrodite forms (perfect flowers). A hermaphro- 

 dite form has been described several times. Each pistil- 

 late flower bears 3 stamens. The plant is usually short- 

 jointed, with very broad leaves. (See Exp. Sta. Rec., 

 Vol. 18, p. 732. Pop. Sci. Mo. Jan. 1906.; Oct. 1911.) 



References on early history : — 



Darwin, Chas. (1874.) Animals and Plants under Domestica- 

 tion, p. 338. 



De Candolle, a. (1882.) Origin of Cultivated Plants, p. 387. 



Stuktevant, E. L. (1899.) U. S. Dept. Agr., Office of Exp. Sta., 

 Bui. 57. 



Harshbergeb, John W. (1893.) Maize : A Botanical and 

 Economic Study. Bot. Lab. Univ. Penn., Vol. I, No. 2. 



Collins, G. N. (1909.) U. S. Dept. Agr., Bur. Plant Indus., 

 Bui. 161. 



References on biological origin of m.aize : — 

 Hackel. (1890.) True Grasses. Translated by Scribner and 



Southworth, pp. 36-43. 

 Grasses of Iowa, Bui. Iowa Geol. Survey, 1903. 

 Harshberger, J. W. Maize : A Botanical and Economic 



Study. Bot. Lab. Univ. Penn., Vol. I, No. 2, p. 94. 

 Montgomery, E. G. (1906.) Wliat is an Ear of Corn ? Pop. 



Sci. Mo., Jan. 1906. Perfect Flowers in Maize. Same, Oct. 



1911. 



References on Zea canina : — 

 Watson. Proc. Amer. Acad. Arts and Sci., 36 : 160. Grasses of 



Iowa. Bui. Iowa Geol. Survey, 1903: 11-19. 

 Bailey, L. H. (1892.) Cornell Univ. Agr. Exp. Sta., Bui. 49. 



