28 SACCARDO, PECK, TRELEASE 



Nectria sanguinea (Sibthorpe) Fries. 



New Metlakatla (Trelease, 685^, on dead bark, associated with 

 Microcera brachyspora) ; Yakutat Bay (Trelease, 6840;). 



Nectria episphaeria (Tode) Fries. 



Sitka (Trelease, 683, on stromata of some sphaeriaceous fungus on 

 branches apparently of Alnus} . 



Family 

 Pyrenophora chrysospora (Niessl) Saccardo. 



Kukak Bay (Coville & Kearney, 15520, on dead petioles and stipules 

 of Oxytropis}. 



Pyrenophora comata (Niessl) Saccardo. 



Port Clarence (Brewer & Coe, 19530) > St. Paul Island, Bering Sea 

 (Macoun in 1891). On dead leaves and stems of Arenaria verna and 

 A. macrocarpa. 



Pyrenophora polyphragmoides Saccardo & Scalia, sp. nov. (pi. v, 



% I3-) 



Peritheciis erumpentibus, sparsis, punctiformibus, nigris, globulosis, 



190-220 /x diam., setis rigidis, fuscis, septatis, 160-190 x 7-5 ^ vertice 

 vestitis ; contextu parenchymatico, fuligineo ; ascis cylindraceis, rectis 

 curvulisve, apice rotundatis, brevissime oblique stipitatis, octosporis ; 

 sporidiis distichis, oblongo-fusoideis, utrinque obtusulis, initio 3~sep- 

 tatis, dein sub-y-septatis, melleis, tandem 9-1 2-septatis, murali-divisis, 

 medio vix v. non constrictis, 36-56 x i8/z, fuligineis. 



Popof Island (Harrington in 1871-2, on decayed stems and leaves 

 of Polemonium humile}. 



Affinis P. phceosporce et P. polyphragmice sed rite distincta. 



Pleospora media Niessl. 



Unalaska (Harrington in 1871-2, in decayed leaves of Drala ver- 

 nalis} . 



Est forma sporidiis latioribus (26-28 X 13-14;*), ut var. Itmonum 

 Penzig. 



Pleospora pentamera Karsten. 



Walden Island (Hb. Thiel., on leaves and stems *of Dupontia 

 jischert) . 



Sporidia plerumque 5-septata. 

 Pleospora infectoria Fuckel. 



Nagai (Harrington in 1871-2, in dead culms of Poa ccesiaf). 



