Leaf Curl and Plum Pockets. 343 



the slender stalk cell is frequently septate as are also the rhizoids. 

 The stalk cells of E. longipes occasionally^ possess a few rhizoids, 

 and this is the case in many of the long stalked species, but the 

 occurrence on those species is rare. These rhizoids are developed 

 both from the stalk cells and from the lower part of the ascus. 

 Their origin is related, or similar in kind, to that of the develop- 

 ment of the later portions of the hymenium in this and other 

 species noted under the discussion of E. longipes. 



A very thin section presents the appearance as if there were no 

 stalk cells whatever, but that the asci arose from a very complex 

 cellular hymenium of several layers in thickness, the inner layers 

 of which are between the epidermal cells of the host. 



The typical form is on the fruit and the structure of the asci 

 and the relation of the stalk cells is shown in Plate XV, figs. 53- 

 57. Some young developing asci from the fruit are shown in fig. 

 57, with a few rhizoids and young hymenial cells. The older 

 asci are difficult to tease out well from their attachment in the 

 epidermal cells so as to preserve all the rhizoids in situ. The 

 asci are slightly clavate, are 30-40 long by 8-10 in diameter. 

 The stalk cells reach a length of 25-35 or 40, and are 3-5 in 

 diameter. The rhizoids and stalk cells as well are frequently 

 septate. This occurs sometimes also in E. longipes but rarely 

 compared with the occurrence in this species. 



The young cells of the hymenium also more early intrude 

 themselves between the cells of the epidermis. The intercellular 

 mycelium is abundant as in the other related species. The 

 spores are elliptical. 



The form on the buds is similar, but the development of the 

 rhizoids is not so profuse, nor are they so long. This may be 

 accounted for I think from the fact that the fruit forms a more 

 suitable nourishment and all the structures are forced to a greater 

 development. The same relation exists between the form on the 

 fruit in E. mirabilis and that on the buds, but in each case it is 

 quite easy to properly correlate the two forms. On the bud the 

 stalk cells intrude themselves far between the cells of the epi- 

 dermis, as shown in fig. 53. In fig. 55 are shown three asci with 

 their stalk cells and the connection near the septum dividing the 

 stalk from the ascus. 



