87 
Sarracenia Drummondit—Colletotrichum, Sac fungus. 
Solanum jasminotdes, var. variegatum—Septoria. 
Spirea, a variegated form—Diplodia. 
Stevia, a variegated form—Phyllosticta. 
Vinca major, var. elegantissima—Phyllosticta, Septoria. 
In the above list of fifty genera, which includes more than a 
hundred species of variegated plants that have been examined, 
it will be seen that there are three genera of fungi that lead all 
others. Phyllosticta is met with twenty-four (24) times, Colleto- 
trichum nineteen (19), and Gloeosporium twelve (12) times. It 
is not the purpose here to enter into the causes of etiolation or 
variegation, or to draw any well defined conclusions from the 
facts. The ordinary green form of the species has been studied 
in many instances, as for example in the ash mentioned at the 
outset, in the Adbutilon, Ageratum, Ficus, Impatiens, Nepeta, Passi- 
Jlora, Pelargonium, and others, with the result that they are much 
less frequently attacked than the variegated sorts. Furthermore, 
in some plants the etiolated part occupies large portions of the 
leaf, and asa rule the portions without the chlorophyll are the most 
Susceptible. In the Asfidistra, for example, the one half of the 
long leaf may be green and the other white, in which case the 
latter is with few exceptions the only one attacked. In the Hy- 
drangea the middle of the leaf is etiolated, and here the blight 
first begins its destructive work. The case is somewhat similar 
in phrynium. In Passiflora, Pelargonium, Sambucus, Ageratum, 
ibiscus, Dracena‘and several others, the white is distributed in 
blotches near to the margin of the leaf, in all of which cases the 
decay due to the fungus produces a ragged edge. When the 
variegation is quite evenly distributed over the leaf in like man- 
ner, the parasite is widely scattered, and the whole leaf decays, 
asin the Dieffenbachia and Abutilon. There seems to be no ques- 
tion that the variegated leaves are more susceptible, and that 
likewise the etiolated parts are the ones first attacked. The ab- 
sence of green in a leaf, from this it is to be inferred, is a source 
of weakness, and upon this account the etiolated tissue is less 
able to resist the attacks of the fungus germs. 
Speaking generally, a variegated plant lacks capacity for the 
best Work, and the gardener, in propagating a variegation, no 
