LICHENS 115 



The following additional species of the genus Leptogium have been 

 reported from Alaska : L. muscicolum (Sw.) Fr., L. tenuissimum 

 (Diks.) Koerb., L. myochroum tomentosum Tuck., collected by 

 Wright on the islands in Bering Strait; L. tremelloides (L. fil.) 

 Fr., collected by Dr. Cooley at Salmon Creek, near Juneau; L. scoti- 

 num Ach. and L. parculum Nyl., reported from Port Clarence by 

 Nylander. 



COLLEMA. 



This genus is represented by two specimens, both of which are 

 sterile. One was collected by Frederick Funston under NO. 21, 

 locality not given. The other was collected by Trelease. The latter 

 specimen is numbered 1 160, but bears no other data. It may possibly 

 be referred to C. pulposum. No. 21 is so fragmentary and incomplete 

 that no determination can be made. 



Species of Collema recorded for Alaska : C. melcenum polycarpum 

 Schaer., collected by Wright on the islands of Bering Strait; C. 

 melcenum Ach., C. triptodes Nyl., C. tenax Ach., C. furvum sub- 

 hirsutulum Nyl., reported from Port Clarence by Nylander; and C. 

 pulposum (Bernh.) Ach., collected by Dr. Bean at Cape Lisburne. 

 Nylander records Collemopsis jlotoviana (Hepp) as having been col- 

 lected at Port Clarence. 



EPHEBE. 

 133. Ephebe pubescens Fr. 



Ephebe pubescens FRIES, S. O. V. 356. 1825. NYL. Syn. i : t. 2.1 and 17- 

 20. 1860. 



Mountain west of Muir Glacier (Trelease, 974). Sterile. New 

 to Alaska. It has been reported from Greenland, but I find no record 

 of it for Newfoundland or Labrador. 



Family PANNARIACEJE. 

 PANNARIA. 



KEY TO THE SPECIES. 



Thallus white, powdery lanuginosa. 



Thallus brown or blackening. 



Thallus of rounded branchlets lepidiota coralliphora. 



Thallus squamulose. 



Thallus yellowish and reddish-brown, apothecia sessile, with a 



broad, thin, light-colored margin hypnorum. 



Thallus darker, apothecia appressed or immersed, margin not so 

 conspicuous and of nearly the same color as the disk...6runnea. 



