TJMBILICARIA. $7 



Rocks. Pennsylvania (Muhlenberg) Ach. L. U. 1810; and 

 common throughout the northern States and Canada; as in 



Arctic America, Richardson. A reduced, thickened, scarcely 



pitted, and at length somewhat polyphylline state (v. alpina, 

 Tuckerm. I. c.) occurs on alpine rocks in the White and Green 

 Mountains, Tuckerman] and in Hastings county, Canada, 

 Macoun. 



Stock of U. veiled. 



11. U. hirsuta (Ach.) Stenh. ; thallus one-leaved, membra- 

 naceous, softish, somewhat powdery ; pale ash-coloured ; be- 

 neath pale, and hirsute with mostly dense and pale fibrils; 

 ["apothecia small, appressed, orbicular, soon convex, plicate. 



Spores ellipsoid, simple, decolorate, ^ mic."] U. vellea, YJ 



Fr. L. E. p. 358. Th. Fr. Scand. p. 155. 



/9, grisedj Th. Fr. ; small, finally blackening beneath, where 

 it is granulate, and either naked, or very sparingly now fibril- 

 lose. U. murina, DC. Nyl. Scand. p. 116. 



Rocks in high mountains. Mexico (v. papyrina], Nylander. 



/?, alpine county, California, infertile (L A. Lapham), Tuck- 



erman Calif. 1866. This variety is a distinct form, and taken 

 for a species by Nylander, according to whom the spores also 

 vary from those of a. The last is scarcely as yet known here. 



12. U. vellea (L.) Nyl.; thallus large, one-leaved, coriaceous, 

 smoothish ; glaucous - ash - coloured ; beneath brownish and 

 blackening, very hirsute ; apothecia small, appressed, orbicular, 

 plicate, becoming convex, and immarginate. Spores rounded- 



or short-ellipsoid, simple, decolorate, ^- mic. Nyl. Scand. 



p. 114. Th. Fr. Scand. p. 153. U. hirsuta, Tuck. Exs. n. 47. 



b. the under side granulate, fibrils mostly obsolete. U. 



tylorhiza, Nyl., fide Th. Fr. 



Rocks in high mountains. White Mountains, Tuckerman 

 (U. hirsuta of Syn. N. Eng.) 1848. Newfoundland, Despreaux. 

 North Shore of Lake Superior, Agassiz. Rocky Mountains, in- 

 fertile. Hall. North West coast, infertile, Douglas. Fronds at 



length reaching six inches in diameter ; but the fruit not exceed- 

 ing one line. 5, Southern Colorado, Brandegee (Herb. Willey). 



13. U. Dillenii, Tuckerm. ; thallus large to very large, one- 

 leaved, coriaceous, smooth ; from tawny- at length sooty-brown ; 

 beneath very black, closely hirsute with short fibrils ; apothecia 

 middling-sized, attached only at the centre, orbicular, convex, 



