446 CALIFORNIA ACADEMY OF SCIENCES 



Pleospora oligomera, Sacc. & Speg. — On dead stems of 

 Silene GaUica, San Francisco, 1885. 4089 



Pleospora Typh^, Pass. — On dead leaves of Tupha lati- 

 folia, San Francisco, June, 1882. 2986 



Cucurbitaria Eibis, Niessl. — On dead leaves of Ribes san- 

 gidneum, Blue Canon, June, 1882. 3297 



Thyridium cingulatum, (Mont.) — On dead branches of 

 S ymphoricarpus racemosus, Alta, August, 1884. 3827 



]V[azzantia Galii, (Fr.) — On Galium aparine, Sausalito, 

 August, 1881. 2772 



Phyllachora effusa, Scliw. — On Heliantlius gracilentus, 

 San Vicente, July, 1885. 4065 



Phyllachora Pteridis, (Keb.) — On living leaves of Pteris 

 aquilina, Blue Canon, Sierra Nevada, September, 1882. 



3398 



Phyllachora? Polemonii. — Amphigenous; spots black, 

 roundish, 1-3 lines broad, papillate and shining. 



Growing on both surfaces of living leaves of Polemoniura 

 huinile, Donner. Sierra Nevada, September, 1882. 3397 



This fungus, which is very abundant and showy, has not 

 yet been found mature. A section shows the densely ag- 

 gregated perithecia involved in the stroma, but no trace of 

 asci. 



The high altitude at which it grows (over 7,000 feet) ac- 

 counts for this fact, as it is covered b}^ the heavy snows of 

 winter before the formation of asci, and the texture of the 

 leaves on which it is found is so thin and fragile that no 

 trace of them can be found the succeeding year. 



