108 PELTIGERA. 



p. 325; Scand.p. 89. P. scutata, Flat., Koerb. Syst. p. 60, pro 

 p. P. scabrosa, Th. Fr. Lich. Arct. p. 45. 



Kocks, etc. Greenland, (Breutel) Koerber, Syst. 1855 ; 

 Wenck. Kotzebue's Sound, Herb. Babington. White Moun- 

 tains, with the other characters, but infertile and therefore doubt- 

 ful, Tuckerman. Sometimes thinner, but distinct, so far as the 

 specimens go, from the last. Taylor's lichen was from South 

 America, and, more recently, Nylander has proposed to separate 

 this (Lindig N. Gran. n. 2520) from the northern plant (Norrl. 

 Lich. Fenn. n. 116) but he gives no reason for so doing. The 

 spores of P. pulverulenta are longer than in any other species ; 

 now measuring, in the northern form, ^^ mic. ; Nyl. 



7. P. malacea (Ach.) Fr. ; thallus middling-sized, spongy 

 and softish, granulate more or less, but becoming downy ; livid- 

 brown ; clothed beneath with a dense black nap which is paler 

 and rarely white-foveolate at the margins; scarcely fibrillose; 

 apothecia on extended lobules, middling-sized, orbiculate ; disk 



brownish-black. Spores acicular, 4-6-locular, - ~ mic. Fr. 



L. E. p. 44. 



On the earth in high mountains. Sub-alpine region of the 

 White Mountains, Tuckerman, Syn. N. E. 1848. Rocky Moun- 

 tains (a small fragment, but appearing to belong here), Willey 

 herb. 



8. P. rufescens (Neck.) Hoffm. ; thallus middling-sized, cor- 

 iaceous, rigid, somewhat downy, and the narrowed, crowded, 

 sub-imbricate lobes elevated and crisped ; greenish-ash-coloured 

 becoming at length dark-reddish-brown ; beneath reticulated 

 with brown veins, which are browu-fibrillose ; apothecia on ex- 

 tended lobules, middling to ample, soon vertical and oblong, 

 revolute ; disk as in the next. Spores acicular, 4-8-locular, ^J 

 mic. Fr. L. E. p. 46. Tuckerm. Lich. exs. n. 104. 



On the earth, rocks, and trunks, among mosses, New England, 

 Tuckerman, Syn. N. E. 1848. New Jersey, Austin. Canada, 

 Agassiz. Arctic America, Richardson. New Mexico, Fendler. 

 Oregon, Hall. A long known and almost universally recog- 

 nized lichen, with probably much the same range as the next 

 species, but very often exhibited in embarrassing relations to 

 that. The spore-dimensions are derived from but few measure- 

 ments, of such specimens only as appeared tolerably certain ; 

 they closely however accord with Nylander's. Peltidea spuria, 



