24 
Journal of Mycology 
[Vol. 12 
8. Puccinia substerilis E. & E. — Fine material on Stipa 
viridula collected in August, 1904, at Boulder, Colo., was sent 
by Mr. Bethel, who also sent living plants of A. viridula and .S'. 
comata. This material showed a great abundance of amphi- 
spores, 25 but almost no teleutospores. The amphispores gave 
good germination, and were sown April 6 on S. viridula and S. 
comata . Uredospores of the usual kind began to appear on S. 
viridula April 18, but no infection on S. comata. Another sow¬ 
ing was made April 22 on S. comata, which also gave no infec¬ 
tion. Uredospores continued to form for a month on 5 . viridula, 
but no amphispores or teleutospores were produced. 
Mr. Bethel also sent fine teleutosporic material on Stipa 
comata, collected in March, 1905, at Boulder, Colo. This was 
sown on Aster ericoides April 18, and contrary to expectation 
gave no infection. When the failure became assured, it was 
sown again, April 29, on A. ericoides, A. multidorus, and A. 
Novae-Angliae, but in each case without infection. This nega¬ 
tive result throws some doubt on the assumption that the Ameri¬ 
can Stipa rusts on the several species of hosts belong to one 
species, having its aecidia on certain species of Aster, 26 and the 
present very incomplete report is therefore entered under the name 
P. substerilis. Reducing this name to a synonym of P. stipae, as 
the writer did a few months since, 27 is now believed to have 
been premature. 
9. Puccinia Seymouriana Arth. — At the time this spe¬ 
cies was published, 28 it was suggested upon grounds of spore 
resemblance that its Aecidium was A. Cephalanthi Seym. From 
combined morphological and geographical data I was then will¬ 
ing to assert that “although cultures must be awaited, yet there 
can be little doubt that the early stages of P. Seymouriana occur 
upon Cephalanthus.” Persistent efforts to secure material for 
this trial were finally rewarded by the writer finding especially 
good teleutospores on Spartina cynosuroides at English Lake, 
Ind., in the northern part of the state, in March, 1905. These 
were sown on Poly gala Senega April 20, with no infection, and 
later on Cephalanthus occidentalis, May 13, with abundant 
results. On May 18 great numbers of spermogonia began to 
show, and on May 27 still greater numbers of aecidia, thus veri¬ 
fying the prediction made three years before. 
10. Uromyces acuminatus Arth. — Finding the aecidium 
of this very common rust was due to a fortunate accident. Of 
the many trials to find the connection between the two phases 
20 For description and illustrations of the amphipores in this species 
see Bull Torr. Bot. Club 32 : 38. 1905. 
20 For cultures of Puccinia Stipae see Jour. Mycol. 11 : 63. 1905. 
27 Tour. Mycol. it: 11. 1905. 
28 Bot. Gaz. 34 : 12. 1902. 
