CALIFORNIA ACADEMY OF SCIENCES. 37 



Peridermium Harknessii. Moore. 



Sperniogones. Unknown. 



Protospores. Peridia aggregated, irregular, encircling the 

 stem; spores irregular, very finely echinulate, orange, becom- 

 ing white. /* 35 — 40. 



On stems and branches of Pinus insignis, P. ponderosa 

 and P. Sabiniana. 4-49. 



Appearing as annular swellings, often 2 feet in circumfer- 

 ence upon the trunks and branches. In the Sierra Nevada, 

 below the height of 4,000 feet, and in the Coast Kange. Par- 

 ticularly abundant at Monterey. 



The different species of Peridermium of the pine seem to 

 be doubtfully distinct. H. W. H. 



Didymaria spissa. 



Hypophyllous, lrypha very short, compacted into a dense 

 tuft, aggregated into oblong white spots ^ — lcm. long; 

 spores oblong-elliptic, of ten dividing at the septum. }x 27 X 7. 



On living leaves of Solidago occidentalis. San Francisco, 

 July. 2658. 



Stigmina thermopsi. 



Amphigenous in irregular brown spots; tufts minute, hy- 

 pha very short, simple, brown; spores oblong or oval, rough, 

 1 — 2-septate, brown. /< 24 X 12. 



On living leaves of Thermopsis Californica. Tamalpais, 

 June. 3216. 



CAMP0SP0RIUM, nov. gen, 



(Ehjm. Campe: larva, from the resemblance of the spore to 

 the larva of Danais Archippus.) 



Hypha brown, flexuous, septate. Spores 1—2, attached 

 by slender pedicels to the angles of the apex, transversely 

 pluriseptate with filiform setae springing from the apex. 



Camposporium, antennatum. 



Hypha septate, flexuous brown; spores 1—2, cylindrical, 



