in the Brontes and their Brown Rust . 
297 
TABLE XXII. 
Exp. Nos. 774 and 775. Seedlings a week old infected on first leaf with tested 
vigorous spores at temperature near optimum. 
No. 
Date of 
infection. 
Host. 
Origin of 
spores. 
No. of 
plants. 
No. in- 
fected. 
July 30 
1 
July 31 
Results. 
Aug. 1 
Aug. 2 
Aug. 4 
774 
a 
Tuly 21 
B. mollis 
B. mollis 
10 
5 
3 
4 
5 
5 
5 
b 
B. tectorum 
8 
4 
0 
0 
0 
0 
0 
c 
July 22 
B. ciliaris 1 
8 
5 
0 
0 
0 
0 
0 
d 
Tuly 21 
B. brizaeformis 
1 1 
5 
2 
2 
2 
2 
2 
11 
e 
99 
B. secalinus 
11 
10 
5 
3 
3 
4 
5 
5 
11 
f 
99 
B. macrostachys 
19 
9 
5 
0 
4 
4 
4 
4 
11 
g 
July 22 
B. inermis 
11 
10 
5 
0 
0 
t> 
0 
0 
n 
h 
99 
B. pratensis 3 
11 
9 
5 
0 
0 
0 
0 
0 
19 
i 
July 21 
B. velutinus 
11 
7 
4 
0 
2 
3 
3 
3 
91 
k 
99 
B. sterilis 
11 
6 
4 
0 
0 
0 
0 
0 
11 
l 
99 
B. maximus 
11 
7 
4 
0 
0 
0 
0 
0 
99 
m 
99 
B. madritensis 
11 
9 
4 
0 
0 
0 
0 
0 
99 
n 
July 22 
B. Schraderi 3 
11 
11 
5 
0 
0 
0 
0 
0 
99 
0 
99 
B. unioloides 3 
11 
3 
2 . 
0 
0 
0 
0 
0 
99 
P 
99 
B. canadensis 
2 
2 
0 
0 
0 
0 
0 
99 
q 
19 
B. erectus 
11 
4 
2 
0 
0 
0 
0 
0 
99 
r 
91 
B. giganteus 
11 
1 
1 
0 
0 
0 
0 
0 
775 
a 
19 
B. mollis 
B. secalinus 
7 
4 
0 
0 
0 
0 
0 
99 
b 
91 
B. tectorum 
11 
6 
4 
0 
0 
0 
0 
0 
99 
c 
11 
B. ciliaris 
11 
9 
5 
0 
0 
0 
0 
0 
99 
d 
99 
B. brizaeformis 
1 1 
8 
5 
0 
0 
3 
3 
3 
99 
e 
19 
B. secalinus 
11 
9 
6 
3 
4 
6 
6 
6 
99 
f 
11 
B. macrostachys 
11 
9 
5 
5 
5 
5 
5 
5 
99 
g 
11 
B. inermis 
11 
8 
5 
0 
0 
0 
0 
0 
99 
h 
11 
B. pratensis 
11 
6 
4 
0 
0 
0 
0 
0 
99 
i 
11 
B. velutinus 
11 
10 
5 
0 
3 
4 
4 
4 
99 
k 
11 
B. sterilis 
11 
6 
4 
0 
0 
0 
0 
0 
99 
l 
11 
B. maximus 
11 
6 
4 
0 
0 
0 
0 
0 
99 
m 
1 1 
B. madritensis 
11 
7 
4 
0 
0 
0 
0 
0 
99 
n 
11 
B. Schraderi 
1 1 
8 
4 
0 
0 
0 
0 
0 
99 
0 
11 
B. unioloides 
2 
2 
0 
0 
0 
0 
0 
99 
P 
11 
B. canadensis 
11 
2 
2 
0 
0 
0 
0 
0 
1 Species needs further examination. 2 Species needs revision. 3 Synonyms. 
thereby rendered an unsuitable medium, the infecting tube 
may fail to gain a successful entry, or the mycelium may be 
starved and unable to form a new crop of spores, or it may 
remain dormant for a time until the tissues regain their nor- 
mal capacity for supporting it. It is even probable that the 
mycelium may be starved out by the, in a sense, dominant 
tissues of the host-plant, when itself very feeble, if the 
x 
