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1900 | BRIEFER ARTICLES 57 
course possible that sections of limbs may offer less resistance to the 
fungus than they would had they not been removed from the tree. But 
the fact that these sections were taken from the tree in the fall, and 
were inoculated immediately before any great change in the tissues 
could have taken place, together with the fact that the inoculations 
were followed by such virulent attacks of the disease, seems to offer at 
least a very strong probability of its parasitic nature. 
The fungus, which appears never to have been described, may be 
characterized as follows: 
Gleosporium malicorticis, n. sp.— Parasitic in the cortex of branches of 
Pyrus malus. Affected areas dark brown, limited by ragged irregular fis- 
sures, sometimes 5—7.5 X 15-20, occasionally girdling the branch. Acervuli 
scattered, triangular, rupturing the epidermis, 300-800 in diameter. No 
pycnidia. Conidial mass at first cream-colored, later dark. Conidia borne 
on upright basidia, which arise from a subepidermal stroma. Conidia con- 
tinuous, coarsely granular, at first hyaline, later with greenish tinge, ellip- 
tical, curved, sometimes geniculate, 5-7X16-28 u, average 6X24u. Those 
grown in cultures smaller and rarely curved. 
To Professor G. F. Atkinson, of Cornell University, I am greatly 
indebted for advice and assistance.—A. B. CorDLEY, Oregon Experi- 
ment Station. 
NoTE.— Since this article was written, in November 1899, what is prob- 
ably the same fungus has been described by Professor C. H. Peck in the Jan- 
uary number of the Bulletin of the Torrey Botanical Club, under the name of 
Macrophoma curvispora, \f this supposition proves to be correct the name 
Proposed by me will of course have to be abandoned.—A. B. 
EXPLANATION OF FIGURES. 
Fig. 1. Gleosporium malicorticis Cordley ; front view of depressed area 
on apple limb, natural size ; photograph taken after the limb had dried. 
Fig, 2. Same, side view. 
__ Fic. 3. Front view of old and dead area ona living apple limb, natural 
siz€; photograph taken after the limb had dried. 
e above three apple limbs were from Oregon, and were photographed 
ss Miss Agnes Vinton Luther in the Botanical Laboratories, Cornell Univer- 
sity, during the summer of 1899. 
1G. 4. Fluffy colonies of the pure culture of the fungus in test on wears 
Stems, natural size. 
Figs. 5 and 6. Front view of depressed area as a result of inoculation of 
pure cultures on sections of living apple limbs at Cornell University. 
