603 



Forming black, thin, irregularly erumpent, granulated patches an 

 inch or -more long. Asci short, obovate. 



On stems of Eupatorium coronopifolium, North Carolina. 



Ph. 6iegans, Schw. Syn. N. Am. 1914 (sub Dothidea). 



Spots half an inch across, olive-green, at length black, often con- 

 fluent, composed of branching fibrils, radiate-divergent and anastomos- 

 ing; shape of the spots always elliptic-acuminate. Cells minute, 

 abundant, shining-black, often scattered outside the limits of the spots. 



On Phytolacca stems, Carolina and Pennsylvania (Schw.). 



Ph. Phlogis, Schw. Syn. N. Am. 1931 (sub Dothidea). 



Spots dark brown, subindeterminate, narrow, sublinear, not cov- 

 ered, composed of an aggregation of minute cellules. 



On stems of Phlox undulata (cult.), Bethlehem, Pa. (Schw.). 



Ph. Cheonpodii, Schw. Syn. N. Am. 1919 (sub Dothidea). 



Spots of medium size, formed of radiating fibrils, dark brown, 

 tolerably thick, scarcely branching, elevated in the center, loaded with 

 perithecia or cells, rather large, covered, globose-depressed and ostio- 

 late. Spots often confluent. 



On lai-ge stems of Chenopodium, Bethlehem, Pa. (Schw.). 



Ph. raraosa, Schw. Syn. N. Am. 1912 (sub Dothidea). 



Spots oblong, black, with branching fibrils radiating only longi- 

 tudinally, partially covered at first. Cellules seriate, crowded, at 

 length ruptured. Spots not exceeding 4^6 mm. long. 



On herbaceous stems, especially of Ghenopodium, Bethlehem, Pa. 

 (Schw.). 



Ph. effiisa, Schw. Syn. N. Am. 1893 (sub Dothidea). 



Broadly efl^used on determinate black spots consisting of innumei'- 

 able minute perithecia, elevated, black, crowded, innate and confluent 

 with the epidermis, but more scattered around the margin and seated 

 on a fibrillose subiculum. 



On stems of Helianthus annuus, Bethlehem, Pa. (Schw.). 



This and the four preceding species seem to be referable to Aster- 

 oma. 



The following numbers placed under Dothidea by Schweinitz, 

 in his Synopsis of North American Fungi, ai'e (sec. specc. in Herb. 

 Schw.) not ascigerous. 



