42 CRANBERRY DISEASES. 



425 fjL in diameter and consist of slender, thin-walled, unarmed 

 hyphae, forming an anastomosing arachnoid layer about the mass of 

 asci. The asci are globose or subglobose, very thin walled, and 7 to 

 8 fx in diameter (PI. IV, figs. 20 and 21). The ascospores are ovoid, 

 light lemon yellow in mass, echinulate-roughened, and measure from 

 3.25 to 4 by 2 to 2.5 fi (PI. IV, fig. 22). The asci are very closely 

 packed together and borne upon the tips of the very slender and 

 scantily l>ranched filaments of the ascogenous hyphse. It is not until 

 the ascospores are fully mature that the color and rough surface are 

 readily recognized. 



The species is closely related to A. candidtis (Eid.) Schroet., but 

 diflfers in having rough, faintly colored spores. A minute, greenish, 

 conidial form resembling Penicillium occurred in all the old cultures 

 of this fungus. These cultures Avere apparently pure and free from 

 contamination, and it seems quite probable that this represents the 

 conidial stage of this Arachniotus. We have, however, been unable 

 as yet to satisfactorily demonstrate this by other cultures made from 

 ascospores and conidia. This fungus has not been found fruiting in 

 the field, and is probablj^ of no great pathological importance. 



Septoria longispora Shear.-* — This fungus has been collected three 

 times in New Jersey — twice upon cranberry leaves and once upon a 

 fruit. It has also been grown in ten cases in cultures from cranberry 

 leaves. The pycnidia are scattered over the surface of the leaf or 

 fruit and seated beneath the epidermis. They vary in size from 120 

 to 250 IX in diameter (PI. IV, figs. 12 and 13). No definite spot or 

 discolored area seems to be formed. The pycnospores are very long 

 and slender and curved, varying from 150 to 240 /x by 3 to 4 ytt (PI. 



IV, fig. 14). ^W\e\\ straightened they reach 300 ti long. They are 

 borne on simple slender sporophores 6 to 9 /a long. The length of the 

 spores seems to separate this species from any other Septoria de- 

 scribed, as they are twice as long as- those of any species heretofore 

 known. This fungus appears to attack the fruit but rarely. It has 

 been found only in New Jersey, and is apparently of infrequent 

 occurrence. 



^ Sphaeronema pomorum Shear.-* — This fungus has been found but 

 once. It was obtained in a culture made by the transfer of hyphse 

 from the interior of a diseased berry taken from a lot of sprayed fruit 

 from New Jersey. It has been kept growing on culture media for a 

 long time. The fungus first formed a thin white layer upon the 

 culture medium, and this Avas soon followed b}^ the development of 

 numerous pycnidia quite evenly scattered over the surface of the 

 mycelial layer, giving it a dark appearance. The jjycnidia are 

 membranous or subcoriaceous, globose or subglobose, 120 to 200 (x. 

 in diameter, and provided with a slender neck about 80 p. long (PI. 



V, fig. 1). The pycnospores are hyaline or pale greenish yellow in 



110 



