368 HERRE 



aa. Under surface with cyphels. 



c. Not sorediate ; thallus black, always sterile. ...2. fuliginosa^ 368 

 cc. More or less sorediate. 



d. Thallus smooth, marginally sorediate ; always sterile. 



3. limbata., 36S. 

 dd. Thallus lacunose-reticulate ; apothecia usually abundant. 



4. anthraspis^ 369. 



I. STICTA PULMONARIA (L.) Acharius. 



Thallus leathery, medium to very large, irregularly and 

 loosely lobed ; the surface reticulate and deeply pitted ; lobes 

 narrow, deeply and sinuously crenate ; the margins and reticula- 

 tions often sorediate or isidiose ; color varying from bright green 

 to olivaceous and yellowish brown ; under surface pale or dark 

 brown villose veined, between large, pale, naked, bullate spots. 

 Apothecia infrequent, marginal, small; disk red-brown. 



Common on trunks of trees in the mountains above 1500 

 feet ; reaching its best development in the redwoods at about 

 2000 feet altitude, the immense lax lobes sometimes having a 

 spread of nearly two feet. 



Occurring also on shaded mossy sandstone in Devils Caiion, 

 at 2300 feet. 



Lichen ^ulmonar his \^. Fl. Suec. 1087. i755- 

 Sticta ^uhnonaria Ach. Lich. Univ. 449. 1810; nom. emend., 



given as S. ^idmonacca. 



2. STICTA FULIGINOSA (Dicks.) Acharius. 



Thallus leathery, more or less round-lobed ; lobes short, 

 wrinkled and pitted, the margin entire, sinuous or somewhat 

 crenate ; color a dark brownish or lurid gra}', this obscured by 

 the dense covering of black isidia, so that the surface appears 

 black ; beneath pale brown, tomentose ; more or less sprinkled 

 with white, concave cyphels. Sterile. 



On rocks, trees, dead wood, old fences, moss, and earth. 



Common at all elevations above 100 feet. 

 Lichen fuliginosiis Dickson, Brit. Crypt, i : 13. 1785. 

 Siiciafuliginosa Ach. Melh. Lich. 281. 1803. 



3. STICTA LIMBATA (Sm.) Acharius. 

 Thallus small, usually one-leaved ; lobes smooth, rounded, 

 broad, the margin crenate or sinuous ; confluent gray soredia 



