36 
VII.—LEAF GLAZE. 
The disease to which we have given the above name makes its ap¬ 
pearance in the form of grayish flattened patches on the upper surface 
of the leaves. These are small and often clustered at first, but soon 
coalesce and become of considerable size. The spots are due to the 
growth of a lichen ( Strigula sp. probably S.complanata , Fee.), which 
draws no nourishment from the leaves but, like the preceding disease, 
must interfere in a measure with the assimilation of the plant. Many 
other lichens and some scale mosses (Hepaticae) are likely to accumu¬ 
late on the trunks and branches of the orange trees where there has been 
careless management of the groves. Their presence is a disadvantage 
to the tree as harboring places for vermin, but they are much less likely 
to have any influence over the physiological functions of the tree than 
the present species. We are not aware that attention has been called 
to this source of trouble before in relation to the orange trees nor that 
any methods of treatment have been recommended for arresting the 
growth of the lichen. Tuckerman reports this species on Magnolia, 
and we found it abundant on Magnolia leaves in Lake County. The 
spots of growth on the orange were small and immature at the time of 
our visit, but as the rainy season advances they are said to increase in 
extent and often spread over considerable portions of the leaf. 
OTHER FUNGI GROWING ON ORANGE TREES. 
Only a few species of saprophytic fungi were found among the orange 
groves, growing on dead or dying trunks and on dead limbs and twigs. 
The two species of Rypochnus , whose systematic position is uncertain, 
grow on the trunks of living trees that are usually more or less covered 
with lichens and Jlepaticae. The following were found, some not being 
in a condition to be specifically identified: Schizophyllum commune , Poly- 
porus sp., Corticium sp., Rypochnus albo-cinctus, R. rubro-cinctus , Xylaria 
sp., Diatrypella citricola , Ellis, n. sp., Macrosporium , sp., and some oth¬ 
ers of still more doubtful relations. 
PEACH BLIGHT. 
Monilia fructigena 1 Persoon. 
By Erwin F. Smith. 
(Plates V and VI.) 
This note is for the purpose of calling renewed attention to the de- 
stiuctive action of Monilia fructigena upon the branches of the peach. 
It will serve to record some new facts and to correct one or two assump¬ 
tions which found their way into a previous paper * without suffi¬ 
cient warrant. 
Journal of Mycology, vol. v, No. 3. 
