152 



Mycologia 



of the discocarp when wet. All three forms of fruit bodies or- 

 dinarily arise intra-epidermally. With the growth of the 

 apothecium the basal portion may extend downward so that the 

 lower portions of the epidermis become surrounded by ceils of 

 the fungus and are lifted up as the point of attachment elon- 

 gates (pi. 10, fig. 22). The intra-epidermal habit is apparently 

 quite fixed even when the leaf is covered with hairs. Sections 

 through pycnidia on leaves of Pelargonium show that while the 

 coarse, pointed hairs as well as the short, glandular hairs are 

 raised so as to stand out like bristles on the wall of the pycni- 

 dium, yet the fungus is found to have invaded the lumen of the 

 lower part of the hairs to a remarkable extent. 



SYNONYMY 



In view of the occurrence of three distinct types of fructifica- 

 tions in the life history of the fungus under discussion and con- 

 sidering that one or all of these forms may be found on a large 

 number of host plants, either living or dead, some of which are 

 distantly related ; it is likely that the synonymy given here is not 

 complete. This synonymy is based primarily upon a careful study 

 of type or authentic specimens of most of the species discussed 

 and on an abundance of fresh and herbarium material from 

 various localities and hosts. A few probable synonyms based 

 upon comparison of original descriptions only have been given. 

 These are indicated in the list. 



I. Conidial Stage, Hainesia lythri (Desm.) v. Hohn. 



Dacryomyces lythri Desm. The oldest name we have posi- 

 tively identified as belonging to any stage of this fungus is Dacryo- 

 myces lythri Desm. In 1846 Desmazieres described this species 

 on the label accompanying No. 1545 of his PL Crypt. France Ser. 

 I. A careful study of the fungus distributed under this number 

 from three sets, two in the herbarium of the Department of Agri- 

 culture and one in the New York Botanical Garden herbarium, 

 shows that it is identical with the conidial stage of the Pezizella 

 described here. Von Hohnel (1906 and 1918) had already 

 pointed out that Desmazieres' plant is a true Hainesia. It may 



