. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). The Anthracnose Disease of the Raspberry 165 observed to be entirely subepidermal. The tissue of which it is composed is in its mature condition hyaline, and varies from a pseudoparenchyma. Fig. 16. ACERvuLus of plectodiscella veneta Section showing the differentiation in the upper and the lower layer of the stroma, also the conidiophores arising in
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). The Anthracnose Disease of the Raspberry 165 observed to be entirely subepidermal. The tissue of which it is composed is in its mature condition hyaline, and varies from a pseudoparenchyma. Fig. 16. ACERvuLus of plectodiscella veneta Section showing the differentiation in the upper and the lower layer of the stroma, also the conidiophores arising in groups. Outlined with camera lucida from prepared slide. The tissue is somewhat shrunken. X 850 in the outer area to a plectenchyma next to the host cells. In the leaves the stromatic tissue consists only of one to several layers of fungous cells. The imperfect stage arises from this stroma both on the leaves and on the canes, while the ascigerous stage has been observed to arise only from the stroma on the canes. The ascocarps of P. veneta are pulvinate, from deep brown to black, and about 75 /x in diameter (fig. 15). They are borne singly or in groups, and they frequently anastomose and give rise to variously shaped bodies. The dark color is due to a layer of thick-walled, brown cells which cover each fruiting body. These cells at maturity split apart and expose the tissue within, which is hyaline, pseudoparenchymatous, and usually in a state of disintegration. The cells of the ascocarps are somewhat larger and thinner-walled than those of the stroma. Globose, thick-walled asci, from 24 to 30 ju in diameter, are scattered irregularly throughout the interior of the fruit body and either lie against one another or are separated by the fungous tissue. The ascospores are bonie parallel to one another in the ascus. They measure from 18 to 21 /.: in length and from to 8 )U in width, and are hyaline, four-celled, ovate, and slightly curved, with constrictions at the septa. The
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