620 



0. tarda, Hark. Bull. Cal. Acad. Feb. 1884, 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 /z." 



On leaves of Rhus diversilobn, California (Harkness). 



0. Haydeni, (B. & C.) 



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

 Ophiodoihis Haydeni, Sacc. Syll. 5351. 



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

 attenuated at each end." 



On stems of A&ter 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 // long. 



MYRIANGIUM, 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. Durifeni. Mont. & Berk, in Mont. Syll. p. 380. 



Myriangium Curtisii^ Mont. & Berk, in Mont. Syll. 1. v;. 



Pyrenotkeca Yunnanensis, Pat. Bull. Soc. Bot. France, i886, p. 155. 



Phymatosphmria Vunnanenszs, Sacc. Syll. VIII, p. 847. 



{Phymatosph(sria Brasiliensis^ Speg. Fungi Puigg. p. 174)? 



{Phymatosphesria A&yssznica, Pass. Fungi Abiss. in Nuovo Gioru. Bot. Ital, 



VII, p. 188)? 

 Cenangium asterinosporum^ K- & K- in EH. N. A. F. 1279. 

 Exsicc. Rav. F. Am. 332.— ^11. N. A. F. 1. c. 



Stromata in densely crowded patches or clusters ^-1 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, 



