CHESTNUT BARK DISEASE, \ 419 
‘Artificial cultures, however, show that it is this species. This 
‘means, apparently, that the species does not form its asco-stage 
readily in the North. It has not been reported as yet from 
Europe or elsewhere. While it seems to be largely saprophytic, 
we recently received from Wolf, of Auburn, Ala., an elegant 
specimen on the live trunk of water oak, that shows it possesses 
parasitic tendencies. Plate XXIVe. 
So far this fungus has been reported on several species 
of Quercus and on Liquidambar Styraciflua. Earle and Under- 
wood collected what may be this species on Vitis. Schweinitz 
described his Sphaeria radicalis as rare on roots of Fagus, though 
on the envelope containing the original specimen he states it 
is on the roots of Quercus, which seems more likely. However, 
we have recently received ample specimens collected by Hall, 
at Clemson College, S. C., on the roots and bark of Fagus, 
which proves that this is to-day a host of the fungus further 
south, and so it may have been at Salem, N. C., as stated by 
Schweinitz. 
In cultures it forms a rather abundant aerial mycelium, 
something like Endothia gyrosa, but differs in that this is 
much more fluffy in character, and does not usually form fruit- 
ing pustules on the surface of the agar, Plate XXVI 7596. 
The conidial spores are produced in rather indefinite spots on 
the mycelium, and are very similar in appearance to those of 
the other two species, Plate XXVIII g-i. The mycelium lacks 
the bright orange color that is characteristic of Endothia gyrosa 
on most media. At first it is white, and often remains partly 
uncolored, but finally has considerable brownish orange color, 
especially next the glass on the surface of the agar. In Petrie 
dishes the mycelium often forms a somewhat annulated. develop- 
ment by the newer growth being less elevated than the older. 
We have cultures of it from Liquidambar Stryracifiua and 
Quercus nigra, from Alabama; Fagus ferruginea, Quercus 
coccinea, and Quercus sp., from South Carolina ; Quercus falcata, 
from North Carolina; and Quercus rubra, from Connecticut. 
There is considerable doubt as to who first described. this 
species, since it has usually been confused with the next. Shear 
(64) speaks of it as Endothia radicalis (Schw.), thus identifying 
it with Sphaeria radicalis of Schweinitz; and the Andersons 
seem to think that Shear definitely proved it to be identical 
