86 UMBILICAKIA. 



Alpine rocks. Arctic America (Richardson), Hooker 1. c~ 

 1823. Newfoundland, Despreaux. Rocky Mountains, Herb. 

 Hook. N. shore of Lake Superior, Macoun. White Mountains, 

 and highest Green Mountains, Tuckerman. Mountains of Cali- 

 fornia, Bolander. 



f f Stock of U. erosa. 



8. U. phcea, Tuckerm.; thallus middling-sized, one-leaved,, 

 cartilagineous, smooth; from ash-coloured becoming tawny- 

 brown ; beneath granulated, paler, but at length now blacken- 

 ing, without fibrils ; apothecia smallish, innate, and now sunken 

 in the thallus (which is then papulose below) but becoming 

 more prominent ; originally angulate, becoming many-angled ; 

 or also rounded ; plicate. Spores ellipsoid, mostly decelerate, 

 H:^ mic. Lich. Calif, p. 115. 



Rocks of the Pacific coast, alt. 1000-3000 ft. (Bolander) Tuck- 

 erman Calif. 1866. 



9. U. erosa (Web.) HofTm. ; thallus of middling size, one- 

 leaved, coriaceous-cartilagineous, of few, rounded lobes, which 

 are soon rimulose, with irregularly torn edges, and more or less 

 reticulately perforate ; from olive- at length blackish-brown ; be- 

 neath paler, or now darker, radiously more or less ridged, the 

 ridges foraminous and this side finally wholly ragged, or passing 

 into fibril-like extensions ; apothecia small, appressed and oblong, 

 passing into stellate clusters ; or more prominent, rounded, and 

 plicate. Spores ellipsoid, fuscescent or decolorate, -^ mic. 



Schcer. Spicil. p. 93. Turn. & Borr. L. B. p. 229. Tuck. 



Exs. n. 48. 



Alpine rocks ; now descending. Arctic America, E. Brown 

 (Parry's Voy.), 1824. Newfoundland, Pylaie. White Mountains, 

 Tuckerman. Mine mountain, Brattleborough, Vt., alt. about 

 1000 ft., Eussell. Mt. Hood, and Rocky Mountains, Hall, etc. 



10. U. Muhlenbergii (Ach.) Tuckerm. ; thallus middling to 

 large, one-leaved, coriaceous at length rigid, irregularly more or 

 less reticulately pitted; olive-brown; beneath mostly darker, 

 granulate, lacerate in anastomosing ridges, and shaggy finally 

 with fibril-like extensions ; apothecia small to middling, origi- 

 nally oblong and appressed, passing into irregular, often stel- 

 late, plicate clusters, without common margin. Ach. Syn. p~ 



67. Tuckerm. Syn. N. Eng. p. 74 ; Lich. exs. n. 144. 



