Crtptogamic Botany and Plant Pathology. 413 



profusiloii oiveir tbe surface of the stems. Frequently the threads 

 aisisociated tihenisielves into istrands, or compacb wefts of pai'allel 

 thread several layers deep. Within these wefts and sti-ands were 

 developed nunieii-oiiis bodies sii^i^'eistiing pycnidila or peritheeia, 

 rotnnd in fonn, the interior cells hyaline and ^vith rich proto- 

 plasmic contents, the peripheral cells dai"k-bw)wn in color. 



In some cases these measured eighty to 100,* and frequently the 

 depth of the weft of dark mycelium in which they wei'e seated 

 exceeded this meaiSTirement. 



Late upon the surface of this ••rowth free threads aldose in a 

 piMJCumbent, aissurgent, or nearl}^ erect position. All of this 

 develojttnent on the bean stems took place in ten days. This cul- 

 ture is very suggestive of the probable development cycle of this 

 Gloeosporium and related forms. It probably presages the devel- 

 opment of an ascigei'ous stiage; whether or not that ever actually 

 takes place is yet to be detenuined. The blackening of the 

 stroma in the pustule on the stems of the privet is probably 

 analagous to the dark weft of mycelium develoj^ed over the bean 

 stems in the culture. In this respect the f ungues resembles the 

 Grloeos|)orium of ripe rot of apples. § 



In the rei>ort of the Mycologist, Department Agi*iculture, 1887, 

 page 348, there is noted what seemed to be an inunature pycnidial 

 stage of GloeospoiTum fructigenum. On apples, affected with 

 Gloeosi^orimn friictigenimi, which were kept until mid- winter, 

 Miss Soutliworth notes one conceptacle in connection with the 

 stroma containing two asci and undeveloped spores, but the cul- 

 ture was so biadly contaminated with other forms that it was 

 thrown away.** The culture being contaminated there might 

 be some doubt of its genetic (Mjnnection with the Gloeosporium, 

 but all this strengthens ithe possibility that several anthracnoses 

 in the future will be known as conidial stages of some more highly 

 organized form. 



*These measurements are in terms of the micromillimeter. 

 g Miss Southworth. Ripe rot of grapes and apples. Journal Mycology, Vol. 

 vi, No. 4. 

 ** Journ. Mycology, vol. vi, No. 4. 



