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 SPHJERIACEJB. 

 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) 5 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, 



fig. 13-) 



Peritheciis erumpentibus, sparsis, punctiformibus, nigris, globulosis, 

 190220 fj. 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 91 2 -septatis, murali-divisis, 

 medio vix v. non constrictis, 36-56 x 18;*, fuligineis. 



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

 of Polemonium humile). 



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



Pleospora media Niessl. 



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

 nalis} . 



Est forma sporidiis latioribus (26-28 x 13-14^1), ut var. limonum 

 Penzig. 



Pleospora pentamera Karsten. 



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

 jisckeri) . 



Sporidia plerumque 5-septata. 



Pleospora infectoria Fuckel. 



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



