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«throws off a great quantity of colorless spores conidia) which 
promote its rapid propagation and distribution. The pow- 
.dery appearance at this time, which all close observers have 
noticed, is due to the accumulation of the undetached 
spores. Later in the season the resting or winter spores are 
formed in minute globular spore-cases, which are first yel- 
low, then change to black as they ripen. The fungus does 
not penetrate the plant on which it grows, but remains en- 
tirely upon the outside, and derives its nourishment by 
absorption through the cell walls. 
I find no record of a surface mildew upon the strawberry. 
It first came under observation on the grounds of the Sta- 
tion in the middle of June of the present year, and was 
noticed on the fruit of the Jucunda first, attracting atten- 
tion from the unpleasant musty taste it imparted. The 
fruit, especially the so-called seeds (akenes) and the fruit 
stems were whitened with the fungus ; it also overran, al- 
though less conspicuously, both surfaces of the leaf blade 
and the leaf stalk. Both ripe and green fruit were -equally 
covered, but it showed best on the former owing to the 
color. The central portions of the thickest masses were 
most affected, but it also appeared on isolated plants ; it 
did not, however, spread over the whole plant, some portions 
remaining quite unaffected. A Jarge number of varieties 
were growing hear together, of which besides Jucunda, 
the Mt. Vernon, May King and Garretson were somewhat 
affected, while intervening varieties nearly or wholly es- 
caped. , 
‘The fungus in this instance is not a new one, but a very 
common form appearing every season upon a variety of 
plants, especially weeds. The dandelion is particularly 
subject to it, and has given occasion for some observations 
that are of interest in this connection. 
There are five rows of dandelion growing in the Station 
garden. The middle row, named Ameliore Tres Hatif, 
having broad plain leaves has mildewed badly during the 
two years it has been under observation. The moss-leaved 
variety, Mousse’ of Vilmorin, with much dissected and 
curled leaves, standing beside the last, was slightly affected; 
the other rows entirely escaped. The interesting point is 
that the fungus, which adapts itself readily to plants of the 
most diverse nature, yet does not attack varieties of the 
same species with equal readiness. 
It is the same fungus which frequently proves detrimental 
to hops, mildewed vines giving but a partial harvest in pro- 
portion to the severity of the attack. 
The interest that the gardener is likely to have in the sub- 
ject of mildewed strawberries lies chiefly in a knowledge 
of the kind and nature of the fungus. When the mildew 

