Rust of Bromes ( Puccinia dispersci). 491 
Series A. Unsuccessful with spores from both B. sterilis and B. mollis. 
Host. 
Spores from B. 
sterilis. 
Spores from B. mollis. 
Total No. 
of Plants. 
A T o. in - 
fected. 
No. success - 
fully in- 
fected. 
Total No. 
! of plants. 
No. in- 
fected. 
No. success- 
fully in- 
fected. 
1. angustifolius 
6 
5 
0 
5 
4 
0 
2. arvensis 
2 9 
15 
0 
29 
15 
0 
3. asper 
6 5 
33 
0 
69 
35 
0 
4. Biebersteinii 
20 
11 
0 
23 
12 
0 
5. breviaristatus 
28 
14 
0 
40 
20 
0 
6. carinatus 
54 
27 
0 
58 
29 
0 
7. ciliatus 
16 
9 
0 
1 2 
8 
0 
8. condensatus 
J 4 
8 
0 
8 
4 
0 
9. erectus 
56 
30 
0 
7 1 
37 
0 
10. Hookerianus 
10 
5 
0 
15 
8 
0 
11. inennis 
3 
3 
0 
2 
2 
0 
12. Kalmii 
1 
1 
0 
7 
4 
0 
13. laxus 
29 
i 7 
0 
35 
18 
0 
14. parvijlorus 
10 
5 
0 
20 
10 
0 
15. fibrosus 
8 
4 
0 
6 
4 
0 
16. pitensis 
9 
6 
0 
14 
8 
0 
17. pungens 
23 
J 3 
0 
29 
16 
0 
18. pumpellianus 
5 1 
26 
0 
59 
30 
0 
19. segetum 
2 
1 
0 
6 
3 
0 
20. unioloides 
26 
14 
0 
35 
19 
0 
21. valdivianus 
29 
17 
0 
! 24 
13 
0 
22. virens 
70 
35 
0 
70 
35 
0 
Series B. Successfully infected with spores from B. mollis , but not with B. sterilis spores. 
23. adoensis 
24 
14 
0 
17 
10 
9 
24. arduennensis 
6 
4 
0 
10 
6 
6 
25. commutatus 
24 
13 
0 
28 
14 
3 
26. grossus 
58 
30 
0 
60 
30 
15 
1 2 7. inermis ( arvensis ) 
36 
1 9 
0 
36 
19 
3 
28. macrostachys 
7 
0 
14 
7 
1 
29. mollis 
106 
53 
1 ? 
127 
62 
53 
30. multiflorus 
5 
3 
0 
1 1 
6 
3 
31. patulus 
27 
14 
0 
16 
8 
4 
32. squarrosus 
19 
1 1 
0 
25 
13 
1 1 
33, squarrosus , var. 
villosus 
25 
H 
0 
23 
12 
9 
34. arvensis ( inermis ) 
33 
17 
0 
20 
TO 
1 
Series C. Successfully infected with spores from B. sterilis , unsuccessfully with 
B. mollis spores. 
35. sterilis 
94 
48 
44 
U5 
58 
0 
Series D. Successfully infected with spores from both B. sterilis and B. mollis. 
36. Gussoni 
118 
60 
37 
102 
53 
6 
37. Krausei 
5i 
29 
M 
53 
27 
27 
38. molliformis 
48 
25 
1 
50 
26 
2 
39. -bendulinus 
101 
53 
12 
98 
50 
30 
40. vestitus 
7 
4 
1 
6 
4 
3 
1 Js probably same as 34 and both are probably incorrectly named (see next page). 
