48 CRANBERRY DISEASES. 



200 to 375 IX in diameter, irregularly chambered within and bearing 

 a single j^rominent ostiole. through Avhich all the chambers empty 

 (PI. V. fig. 11). The walls are subcoriaceous and irregular in thick- 

 ness. The sporogenous hyphse form a dense, compact, intricate layer, 

 the ultimate divisions of which are somewhat dichotomous and bear 

 the short, elliptic, inequilateral, or slightly curved, simple, hyaline 

 spores, which are 7 to 9 by 3 to 3.5 /x (PL V, figs. 12 and 12, a). 



The generic relationship of this fungus is rather uncertain, and 

 we have referred it for the present to Ceuthospora, though it does 

 not Avell agree with the description of the genus. 



Valm delicatula C & E. — This fungus has been collected at AATiites- 

 \dlle, X. J., on old cranberry stems which had been piled at the edge 

 of a bog. It also occurs on other ericaceous plants in New Jersey, 

 but has not heretofore been reported upon the cranberry. Associated 

 with the ascogenous perithecia on the same stems was found a Cyto- 

 spora, Avhich is perhaps the pycnidial condition of this species. 



Cladosporiinn oxycocci Shear.-* — There are occasionally found in 

 the spring on leaves of the previous year small, brownish, diseased 

 spots bearing a Cladosporium, to which the above name has been 

 given. The fertile hypha) are brown, septate, more or less flexuous, 

 and erect or spreading. They vary from 50 to 100 fx in length and 

 arise from a small, black, sclerotoid base (PL IV. fig. 2-t). The 

 conidia are acrogenous, varying from ovoid to cylindric-clavate, pale 

 yellowish brown, continuous or uniseptate, and 15 to 24 by 3 to 4 ju, 

 (PL IV, fig. 24, a). AVe have specimens from Arichat, Xova Scotia, 

 from Cape Cod, Massachusetts, and from Belleplain, X. J. 



Another Cladosporium which has not been identified specifically 

 has also been found on dead tips of young shoots of the cranberry 

 from Massachusetts. 



Plectrothrix glohosa Shear. — This fungus was described by the 

 writer in 1902.-- It occurred on cranberry leaves which were kept in a 

 sterile moist chamber in the laboratory and was quite regularly asso- 

 ciated with Pcstalozzia giiepini vaccinil, making its appearance soon 

 after the maturity of that fungus. It jDrobably has bo genetic rela- 

 tion to Pestalozzia, however. The plant has not been collected in 

 the field and is perhaps a simple saprophyte. 



C hondrioderma simplex Schroet. — This myxomycetous fungus was 

 found at Hampton, X. J., covering living cranberry vines and other 

 plants. It api^arently did no injury, however, except such as might 

 be caused by temporarily covering the surface of the leaves and 

 vines. The sporangia and spore masses soon rupture and disappear 

 after maturity and are not likely to do any permanent damage to the 

 plants. 



110 



