GK ASSES OF IOWA. 61 



debrand. Both have come to the same conclusion. P. Dudley* 

 writes as follows: '-Indian corn is of several colors, as blue, 

 white, red and yellow. If these sorts are planted by them- 

 selves, so that no other be near them, they will produce their 

 own color; but if you plant the blue corn in one row of hills, 

 as we term them, and the white or yellow in the next row, 

 they will mix and interchange color." Dr. Sturtevantf says: 

 " Corn, the maize plant, shows in its kernels the influence of 

 cross-fertilization of the same year. Some varieties seem to 

 possess the power of resisting either cross-fertilization or the 

 changes induced thereby." Professor CiozierJ; writes (Cross 

 between Stowell's Evergreen and Yellow Hathaway): "These 

 observations show that foreign pollen affects the appearance 

 of the crossed kernels the first season, but also that an unusual 

 appearance may be due to a cross of the previous year." Pro- 

 fessor Beal§ says: "During the past year I planted near 

 each other three hills of the following kinds of corn, well 

 mixed together, viz: Waukashum, White Flint, Black Pop 

 Corn, Early Minnesota Sweet, King Philip and Black Sugar. 

 Every ear showed a mixture produced by pollen from one or 

 more of the varieties except those of the King Philip variety." 

 But Flint corn did not show the effect of pollen from Dent 

 corn in the first year. Kellerman and Swingle, I who crossed 

 a large number of varieties, have come to the same conclusions 

 that other observers have, namely: that the so-called varieties 

 of maize cross more or less freely, and the effects may or may 

 not be visible the first year. As a result of some work done on 

 the college grounds Professors Crozier and Rolfsl write con- 

 cerning the immediate inliuence of cross-fertilization upon the 

 fruit: "In all cases some, and in some cases all of the ears 

 changed in appearance in the direction of the variety furnish- 

 ing the pollen." A practical gardener, Mr. F. S. White, ^ 

 writes as follows: "The past season I had sixteen varieties 

 of white sweet corn and also a small lot of Black Mexican. 

 When I came to save my seed corn I found grains of this black 

 corn stuck in every variety. ' ' 



♦Philosophical Transactions Abridgment, vol. 6-: 204-205. Kellerman and Swingle. 

 Annual Rep. Kansas Agrl, Exp. Sta. 2: 316, 1889. 

 +Ann. Rep. New York Agrl. Exp. Sta. 2: 37-56. 

 *Proc. Soc. Prom. Agrl. Sol. 1887: 1. 

 §Rep. State Board of Agrl. Mich. 1878: 450. 

 IIAnn. Rep. Kan. Agrl. Coll. Exp. Sta. 3: 288, 1889. 

 HAgrl. Scl., 4: 23. 

 'Iowa State Register, Dec. 11. 1891. 



