

LECANORA. 183 



but more or less radious ; dirty white ; with a laciniate-lobate 

 circumference ; smooth, or beset often with white soredia ; and 

 bearing also a large central, or several smaller and scattered, 

 brown, radiately chinky warts; apothecia smallish, adnate; 

 disk, pale brick-coloured and blackening, with a very entire, 

 tumid thalline margin. Spores ellipsoid, ^ mic. Squama- 

 ria, Nyl. Scand. p. 134. 



Rocks, Greenland (Vahl), Th. Fr. I. c. 1861. White Moun- 

 tains, Willey. Oregon, Hall. British Columbia, Macoun. 



4. L. thamnoplaca, Tuck. ; thallus tartareous ; tawny ; of 

 turgid, crenate scales which are crowded together at the centre 

 and become coalescent, but pass at the circumference into 

 rather lax, narrowed, convex, sinuately cut lobes; apothecia 

 middling-sized, innate -superficial ; disk reddish-black, exceed- 

 ing the stout, entire margin. Spores ovoid- ellipsoid, -|^ mic. 

 Gen. p. 113, note. 



Rocks, near Humboldt city, Nevada (Bolander), Tuckerman 

 I. c. 1873. Rocky Mountains (Yellowstone exp., Coulter), Herb. 

 Willey. Apothecia l mm -, 5-2 mm -, wide. 



5. L. rubina (Vill.) Ach. ; thallus cartilagineous, sub-folia- 

 ceous, peltate ; now monophyllous ; but passing oftener into 

 several to many round-lobed, cut-crenate, finally branch-like 

 divisions ; greenish-straw-coloured ; for the most part black 

 beneath; apothecia middling to ample, appressed; disk from 

 pale yellowish becoming tawny and red; the thin, flexuous 



thalline margin disappearing. Spores ellipsoid, ^ mic. 



Parmelia chrysoleuca, Fr. L. E. p. 113. P. rubina, Schcer. 

 Spicil. p. 435. Squamaria chrysoleuca, Nyl. Scand. p. 131. 



6. heteromorpha,Ach., thallus more or less rimose-rugulose, 

 pitted beneath ; apothecia concolorous becoming pale-brown. 

 L. rubina, ft heteromorpha, Ach. L. U. fide Nyl. Squamaria 

 peltata, Nyl. Scand. p. 132. 



c. opaca, Ach., Fr.; disk decolorate, pale-olivaceous and black. 

 Squamaria melanophthalma, Nyl. I. c. 



Rocks, a, Arctic America (Richardson), Hooker I c. 1823. 

 New England, Tuckerman. Shores of Lake Superior, Agassiz. 

 Kansas, Hall. Rocky Mountains, Hayden. New Mexico, Fend- 



ler. Texas, Wright. California, H. Mann. Oregon, Hall &, 



Organ Mountains, Texas (with a), Wright. Oregon (with a), 



