238 PROCEEDINGS OF THE AMERICAN ACADEMY 



4. S. condensatum, Laur. Podetia erect, terete, scarcely branched, 

 clothed with a thin, white-incarnate tomentum ; squamules roundish, 

 teretish, or confluent, glaucous ; apoth. terminal, dilated, plane, subpel- 

 tate. Fr. Lichenogr. p. 203. S. Meissnerianum, Floerk. ! 



Stones and rocks, in the lower regions of the White Mountains ; 

 somewhat rarely fertile. Occurring also in the deliquescent, degener- 

 ate state called by Acharius S, Cereolus (Meth. t. 7, p. 1). The hori- 

 zontal thallus at the base is persistent, and often conspicuous. 



** Squamules verrucseform, rounded, or angulate. 



5. S. deimdaium, Floerk. Podetia erectish, terete, somewhat spar- 

 ingly branched above, below denudate, glabrous ; granules roundish, 

 thick, cinerascent, at length almost plane, crenate-lobate ; apoth. later- 

 al, minute, somewhat plane. Floerk. ! D. Lich. p. 13. Fr. Lichenogr. 

 p. 204. S. glaucescens, Tuckerm. Lich. N. E. I. c. 



Rocks ; from Greenland, Dill.., to New England, where it is common 

 in mountainous, and ascends to subalpine districts. Southward to Penn- 

 sylvania, Dill. 



6. S. namun, Ach. Podetia erect, slender, fastigiate-ramose, below 

 denudate, above very finely pulverulent ; granules verrucseform, mi- 

 nute, greenish-pallescent, floccose ; apoth. small, lateral, convex. Fr. ! 

 Lichenogr. p. 205. 



Fissures of rocks, and on stones, in the lower regions of the White 

 Mountains ; fertile. 



Sect. II. PiLOPHORON, Tuckerm. Podetia cartilagineous-subfilamen- 

 tous, or araneous-fistulous within ; apothecia subimmarginate, black. 



7. S. Fibula, Tuckerm. Crust persistent, appressed, subsquama- 

 ceous-granulate, bright green ; podetia (solid), erect, terete, simple, 

 somewhat corticate with the green squamaceous granules, at length 

 subdenudate, glabrous ; apoth. (lateral, minute, somewhat plane, sub- 

 immarginate, and) terminal, mostly solitary, at first depressed-globose, 

 immarginate, at length rather inflated, dark-greenish-nigrescent becom- 

 ing black. 



Moist rocks along streams in mountain forests ; White Mountains. 

 Rugose, nigrescent cephalodia (certainly abortive apothecia) occur 

 commonly in the crust, resembling similar ones in S. condensatum. 

 Barren podetia terminated often with powdery green pulvinules, as in 

 S. Cereolus, Ach. Apothecia solid, as in the next, the disk placed upon 



