250 
diseases, appeared this season in sufficient abundance, so that there 
was no lack of opportunity for observation. 
None of the fungi named in the last report could be traced 
through the winter of 1884-5, all track of them being lost when cold 
weather set in. The vines and rotting fruit of a row of tomatoes 
were permitted to lie undisturbed until time to use the ground in 
spring of 1885. It was then lightly spaded and tomatoes again set 
upon it. If the germs ofthe disease had multiplied in the decaying 
refuse during the winter, some evidence of it might be expected in 
its earlier or more abundant attack upon the plants grown at this 
place ; but no such result followed, the plants grew and fruited as 
finely and as free from disease as elsewhere on the Station grounds. 
The general aspect of the malady was somewhat different from 
last year. The brown rot did not so uniformly start at the apex of 
the fruit and produce a brown even surface with definite outline. It 
more often extended in an indefinite manner and gave a wrinkled 
appearance to the surface. A fungus, which was found in 1884, 
but from its infrequency seemed unimportant, appeared in great 
quantities this year. It is Macrosporium Solani KE. & M., named in 
1882,* and closely related to the Cladosporiums, of which some 
species is usually to be found associated with rotting tomatoes. It 
produces by its fruiting a blackish velvety surface not distinguishable 
by the naked eye from that formed by Cladosporium. ‘The spores 
are much larger than in the latter fungus and uniformly septate. It 
is often accompanied by a simple-spored fungus, Phyllosticta Solani 
E. & M.,+ which may, indeed, be but a later condition of it. Dry 
but fresh spores of the Macrosporium were inserted beneath the skin 
of a green tomato on September 30. After a number of days the 
same brown and wrinkled appearance as referred to above gradually 
overspread the fruit. Whether entirely due to the growth of the 
Macrosporium spores or not it is impossible to say. ‘lhe Gloeospor- 
ium described and figured in the last report{ was only seen twice 
during the season, and then in very small amount. Other observa- 
tions on this topic are given by Mr. Goff, the horticulturist, at page 
183 of this report. 
Lettuce Rwvst. 
Septoria Lactuce Pass. 
This disease has been very prevalent on the Station grounds du- 
ring both 1884 and 1885. It becomes conspicuous about the time 
the lettuce is large enough for table use. It attacks the oldest 
leaves first, and gradually works toward the center of the plant. 
*Amer. Nat., XVI, p. 1003. tlc. { Third Annual Report, p. 381. 
