LICHENS 97 



The only specimen in the Tuckerman Herbarium is from the Cascade 

 Mountains in Oregon. This specimen is much more delicate, being 

 not more than two-thirds as long as the Alaska plants, while the 

 apothecia are about half as thick. 



77, Pilophorus cereolus acicularis (Ach.) Tuck. 



BcEotnyces acicularis AcHARius, Math. Lich. 328. 1803. 

 Pilophorus cereolus acicularis TvC¥iEKUAii, Suppl. L. 427. 1858-9. 



Broughton Strait (Trelease, 1302); Sitka (Trelease, 1303; Set- 

 chell, 1265) ; Mount Verstovia, Sitka (Coville and Kearney, 929) ; 

 Juneau (Coville and Kearney, 584; Setchell, 1245) ; Orca (Trelease, 

 1304; Setchell, 1222). Reported by Rothrock^ as occurring in 

 Russian America ; collected by Dr. Bean at Sawmill Creek, Sitka ; 

 by Dr. Cooley at Juneau, 3000 ft. alt., and at Salmon Creek and Gold 

 Creek Canyon, near Juneau. 



One additional variety of this genus has been reported from Alaska, 

 P. cereolus robustus Tuck., which was collected by Wright on the 

 islands of Bering Strait; Macoun collected it "under overhanging 

 rocks " on St. Paul Island. Nylander records its occurrence at Port 

 Clarence, under the synonym Pilophoron polycarpum Tuck. 



STEREOCAULON. 



KEY TO THE SPECIES. 



Thallus dwarfed. 



Tomentose, phyllocladia wart-like tomentosum alpinum. 



Not tomentose, phyllocladia confluent denudaium. 



Thallus of good size. 



Slightly tomentose, apothecia subterminal, dilated .paschale. 



Densely white tomentose, apothecia lateral, minute, not dilated. 



tomentosum, 



78. Stereocaulon denudatttm Flk. 



Stereocaulon denudatum Floerke, Deutsch. Lich. Aiunerk. 4:13. 1 82 1. — 

 Tuckerman, Syn. N. A, L. i : 233. 



Unalaska (Setchell) ; St. Michael (Setchell). 



Dr. Nylander records this species as occurring at Lawrence Bay, on 

 the Siberian coast. According to Professor Tuckerman it has been 

 collected in Alaska by Dr. Kellogg. Common in Greenland and 

 Scandinavia. Reported also from Newfoundland. Pennsylvania is 

 the most southern station given in Tuckerman's North American 

 Lichens. 



^Rothrock, Dr. J. T. Flora of Alaska. Smithsonian Report. 1807. 



