52 
Journal of Mycology 
[Vol. 11 
Canadensis, with no infection. Similar material on the same 
species of host, gathered at Lafayette, Ind., was sown on Oxalis 
violacea, Actaea alba, Macrocalyx Nyctelea, Apios Apios, and 
Solidago ulmifolia, with no infection. What is probably the same 
species of rust, on the same host, was sown in 1903 on eleven 
other species of hosts with negative results. 6 
4. Puccinia on Carex gravida, sent by Rev. Bates from 
Red Cloud, Neb., was sown on Steironema ciliatum, with no infec¬ 
tion. Similar material from the same source was sown in 1903 
on twelve other species of hosts with negative results. 7 
5. Puccinia ludibunda E. & E., sent by Mr. E. Bartholo¬ 
mew from Stockton, Kans., was sown upon Steironema ciliatum, 
Macrocalyx Nyctelea, and Xanthium Canadense, with no infection. 
6. Peridermium on Pinus rigida was sent by Professor 
W. A. Kellerman from Sugar Grove, Ohio, in fine quantity, with 
the suggestion that it would probably grow upon Campanula. It 
was sown June 1st on what were supposed to be four plants of 
C. Americana, but which proved to be Lobelia syphilitica, when 
the plants came into bloom. The plants were unusually thrifty, 
and conditions for success were good, but there was no infection. 
Part of the same collection of spores grew on C. Americana, when 
sown by Prof. Kellerman, 8 showing that they belonged to Coleo- 
sporium Campanulae (Pers.) Lev. 
Sixteen species of rusts were successfully grown, that had 
been studied with success before, and reported upon by the writer 
and in part by other investigators. Mention of them here serves 
to confirm previous work, and to give some additional knowledge 
regarding hosts. 
1. Melampsora Medusae Thuem.— Teleutosporic material 
of this species on Populus deltoides was obtained near Lafayette, 
Ind., and sown May 10 on Larix decidua and Euonymus obovatus. 
The latter gave no result, but the former showed spermogonia on 
May 25, yet owing to weakness of the hosts no aecidia formed. 
The same collection was used to sow on Larix laricina (Du R.) 
Koch (L. Americana Michx.) May 23, which showed spermo- 
gonia June 4, but the host was too weak to permit aecidia to form. 
Teleutosporic material on P. deltoides from Spirit Lake, Iowa, 
by the writer was sown May 10, on Larix decidua and L. laricina, 
with only feeble results on the former owing to the weakness of 
the hosts. Another sowing was made May 23 on L. decidua , 
which gave abundance of spermogonia on May 30, and an equal 
abundance of aecidia on June 4. 
'Jour. Mycol. 10:10. 1904. 
7 Jour. Mycol. 10:10. 1904. 
8 Jour. Mycol. 11:32. 1905. 
