202 
AMERICAN JOURNAL OF BOTANY 
(Vol. 9. 
Table 2 
(The designations "screening wheat," "smutted wheat," etc., are the millers' terms) 
Plot 
No 
Cereal 
Planted 
Variety 
Source of Seed 
Wheat 
Rye 
Oats 
Barley 
"Rusted wheat " 
"Smutted wheat " 
"Screening wheat" 
Haynes Bluestem 
Minnesota no. 163 
" no. 163 
no. 188 
no. 181 
" no. 169 
Rural New Yorker 
Early Genesee Giant 
Dawson's Golden 
Chaff 
Early Red Chief 
Seneca Chief 
Fish-head 
Red Russian 
Amantka 
Galgalos 
Little Club 
Wasnani 
Erivan 
Ghanooka 
Beloturka 
Macaroni 
Rupert's Giant 
Spring 
Tartar King 
White Smyrna 
Chevalier 
Black Hulless 
White Hulless 
Swankali 
Telli 
Gaitami 
Wis. Fed. no. 5 
Fargo Milling Co., Fargo, N. D 
1915 
Washburn-Crosby Co., Minneapolis, 
Minn., 1915 
Fargo Mining Co., Fargo, N. D 
19 1 5 
Arlington Station, 1912 
Akron Substation, 1912 
Arlington, 1912 
Minn, Exp. Station, 1912 
Minn. Exp. Station, 1912 
Minn. Exp. Station, 1912 
Arlington Station, 1912 
Akron Substation, 191 2 
Arlington Station, 19 12 
Arlington Station, 19 12 
Wis. Exp. Station, 1912 
Minn. Exp. Station, 1912 
Akron Substation, 19 12 
Akron Substation, 1912 
Akron Substation, 1914 
Arlington Station, 1913 
Akron Substation, 1913 
Akron Substation, 1913 
Wis. Exp. Station, 1912 
Akron Substation, 19 12 
Wis. Exp. Station, 1914 
Thorburn Co., 19 16 
Thorburn Co., 1916 
Thorburn Co., 1916 
Akron Substation, 1912 
Minn. Exp. Station, 1912 
Hays Exp. Station, 1913 
Hays Exp. Station, 1913 
Minn. Exp. Station, 1912 
Arlington Station, 19 12 
Arlington Station, 19 12 
Minn. Exp. Station, 1913 
As the table shows, the rust appeared simultaneously on all the plots of 
wheat and barley respectively. It appeared at the same time on a resistant 
variety such as the Macaroni wheat and on a susceptible variety such as 
Rupert's Giant; on plants grown from seed coming from North Dakota 
and on plants grown from seed coming from Maryland; on plants from 
good, plump seed and on plants grown from seed rejected by the miller, 
such as the "rusted wheat" and the ''screening wheat" seed. Evidently 
the nature and first appearance of the rust were determined by local environ- 
mental conditions, and variety, age, source, and condition of the seed played 
a subordinate role at least in this particular case. It is also to be noted 
that the rust appeared at different times on the different cereals except in 
