TJMBILICARIA. 85 



fertile. Gyrophora Wenckii, Mull. (Flora Eatisb. 1867, p. 433) 



from Greenland, appears, by the description, to differ from b in 

 nothing but the plicate fruit, looking rather towards that of U. 

 proboscidea ; from which last the first-named shall differ in 

 smaller spores. In an infertile specimen of G. Wenckii before 

 me (Herb. Krempelh.) agreeing generally with the published 

 description, I find small clumps of fibrils on the upper surface 

 and at the margins here and there, once more suggesting U. 

 proboscidea. Spores of G. Wenckii not rarely a little curved 

 (Mull. /. c.), as is observable in U. anthracina-, but also, more 

 rarely, in U. proboscidea. 



5. U. polyphylla (L.) Hoffm.; thallus small, cartilagineous, 

 commonly many-leaved and , clustered, with unequal, crisped, 

 at length much- divided lobules, smooth; dark-olive-brown ; be- 

 neath smooth and very black, without fibrils ; [apothecia small, 

 sessile, orbicular, plicate. Spores ellipsoid, decolorate, "^-" 

 mic.]. Nyl. Scand. p. 119. U. cenea, a, Schcer. Spicil.p.92. 



Alpine rocks, and descending. White Mountains, Tucker- 

 man Syn. 1848. Mt. Desert, Maine. Newfoundland, Despreaux. 

 Greenland, Vahl 



6 U. flocculosa, Hoffm.; thallus of middling size, sub-mem- 

 branaceous ; blackish-brown, scurfy with a sooty efflorescence ; 

 beneath nearly of the same colour, more or less reticulately pit- 

 ted, without fibrils; [" apothecia small, sessile, orbicular, pli- 



cate. Spores oblong ellipsoid, now a little curved, ^ mic."] 



Nyl. Scand. p. 119. Gyrophora, Turn. & Borr. L. B. p. 217. 



Alpine rocks, and descending. White Mountains, Tucker- 

 man Syn. 1848. Mt. Desert, Maine. Rocky Mountains, Herb. 

 Hook. Behring's Straits, Wright. As near to the next cer- 

 tainly as to the last ; but . with larger spores than in either. 

 Not as yet found fertile here. 



7. U. hyperborea, Hoffm.; thallus middling-sized, mostly 

 one-leaved, coriaceous-membranaceous, sparingly lobed, with 

 jagged edges, papulose-rugulose, now here and there perforate; 

 olive-brown ; beneath pitted more or less, smooth, mostly black- 

 ish ; apothecia small, at first appressed, oblong, or angulate, but 

 becoming orbicular and plicate. Spores ellipsoid, mostly decol- 

 orate, ^ mic. Fr. L. E. p. 353. Tuck. exs. n. 143. Nyl. 



Scand. p. 118. 



