234 STEREOCATJLOX. 



E. p. 203, Tuck, Syn. N. E. p. 46 ; Exs. n. 113, pr'. p. Nyl. Syn. 

 p. 250*. 



Granitic rocks in the mountains of New England, Tucker- 

 man Syn. N. E. 1848. Grand Menan, Maine, Willcy. 



8. S. nanodes, Tuckerm. ; podetia short and slender, cse- 

 spitose-conglomerate ; divergently branched from below and 

 more or less fastigiately divided above ; smooth ; phyllocladia 

 glaucous becoming ash-coloured, globular often powdery, but 

 confluent above into squamiform extensions lending a sub-folia- 

 ceous character to the commonly flattened podetia ; (cephalodia 

 much as those of the last;) apothecia terminal ; dilated. Spores 



staff-shaped and acicular, 4-locular, j^ mic. Suppl. 2, I. c. 



p. 201. Nyl. Syn. p. 251. 



Kocks along streams. White Mountains, Tuckerman I. c. 1848. 



9. S. albicans (Th. Fr.) Nyl. ; podetia small, very slender, 

 softish, and fragile, csespitose ; sparingly fastigiate-branched ; 

 delicately tomentose ; white, but blackening below ; phyllocladia 

 glaucous-white, minute, rounded, dull, soon powdery, scattered, 



mostly toward the summits ; apothecia unknown. Nyl. Syn. 



p. 252. S. tenellum, Tuck, in Bot. Wilkes Voy., p. 123, t. 2,/. 2. 



Rocky Mountains in Colorado, Brandegee, comm. Sprague. 

 Guadalupe Island, Lower California, Palmer, comm. Willey. 

 Representing here S. nanum of Europe ; and like that ap- 

 parently always an imperfect organism. 



* * Phyllocaulon. Phyllocladia obsolete. 



10. S. Wrightii, Tuckerm. ; podetia short, densly caespitose, 

 ascendant; sparingly branched from the blackening base; 

 dilated above into cut-crenate, lobe-like, greenish segments 

 with inflexed, crisped, white margins ; tomentose on the under 

 side ; (cephalodia conspicuous, pulvinate, granulose, olivaceous, 

 and blackening;) apothecia unknown. Suppl 2, I c. p. 202. 



Rocks; islands of Behring's Straits, Mr. Wright. Very 

 marked as are the features of this lichen, the development of 

 the summits is in fact not ill comparable with the final condi- 

 tion of those of S. nanodes. The gonimia of the cephalodia 

 occur in nodules, from rounded-oblong at length difform-elon- 

 gated, resembling those of 8. Colensoi, as exhibited in Nyl. 

 Syn. t. VII., f. 8. 



