620 



0. tarda, Hark. Bull. Cal. Acad. Feb. 4884, p. 46. 



" Hypophyllous, in irregular, angular spots 3-4 mm. broad, often 

 confluent, papillate, shining black. Asci 8-spored, cylindrical, abruptly 

 contracted, curved and bulbous at the base, 57 x 9 //. Sporidia 

 linear, pluriguttulate, 42 x 2 //." 



On leaves of Rhus diversiloba, California (Harkness). 



0. Haydeni, (B. & C.) 



Dothidea Haydeni, B. & C. Grev. IV, p. 104. 

 Ophiodothis Haydeni, Sacc. Syll. 5351. 



" Forming elongated, irregular, papillose patches. Sporidia linear, 

 attenuated at each end." 



On stems of Aster and Erigeron, Nebraska. 



0. alnea, (Fr.) 



Dothidea alnea, Fr. S. M. II, p. 564. 



Amphigenous, scattered, subrotund, black, shining, collapsing to 

 rugose-plicate. 



On Alnus serrulata, Pennsylvania (Michener). Sporidia (sec. 

 Berk. Grev. IV, p. 105) linear, 10 ft long. 



MYRIANGITJM, Mont. & Berk. 



Mont. Sylloge, p. 380. 



Stromata numerous, small (1 mm.), crowded, rounded or angular 

 from mutual pressure, convex above, black, with or without an or- 

 bicular, thalloid subiculum, multilocular, each cell with a single apar- 

 aphysate ascus. Sporidia muriform, hyaline. 



M. Durieni, Mont, & Berk, in Mont, Syll. p. 380. 



Myriangium Curtisii, Mont. & Berk, in Mont. Syll. 1. c. 



Pyrenotheca Yunnanensis, Pat. Bull. Soc. Bot. France, 1886, p. 155. 



Phymatosphcsria Yunnanensis, Sacc. Syll. VIII, p. 847. 



(Phymatosphczria Brasiliensis, Speg. Fungi Puigg. p. 174)? 



(Phymatosphcsria Abyssinica, Pass. Fungi Abiss. in Nuovo Giorn. Bot. Ital. 



VII, p. 188)? 

 Cenangium asterinosporunt, H. & K. in F41. N. A. F. 1279. 

 Exsicc. Rav. F. Am. 332. FH. N. A. F. 1. c. 



Stromata in densely crowded patches or clusters \-\ cm. across, 

 the single stromata |-1 mm. diam., black, plane or convex above, sub- 

 orbicular or angular from crowding. Ascigerous cells minute, scat- 

 tered irregularly but abundantly through the substance of the stroma, 

 obovate or subglobose, each containing a single ascus. Asci globose, 



