90 PELTIGEREI. 



17. U.pustulata (L.) Hoffm.; thallus small to middling in 

 the mountain forms, one-leaved, coriaceous, papulous ; whitish- 

 ash- coloured, more or less powdery or at length chinky; be- 

 neath reticulately pitted, granulated, dark-brown now grey- 

 pruinose ; apothecia small to almost middling, simple, flat, with 

 an obtuse, at length irregular margin. Spores solitary, ellip- 

 soid, muriform-multilocular, brown, ^^mic. Fr. L. E. p. 351* 



Gyrophora, Turn. & Borr. L. B. p. 232. 



b. papulosa, Tuckerm. j thallus middling to large, darker, 

 and often brownish ; apothecia soon proliferous. Spores longer, 



gjnric. Syn.N.E.p.7Q] Exs. n. 141. Gyroph. papulosa, 



Ach. Syn. p. 67. 



Eocks. a, New York, Halsey View, 1823. Alpine region of 

 the White Mountains, Tuckerman. Organ Mountains, Texas, 



Wright. Mountains of New Mexico, Fendler. &, though also 



alpine, is the common low- country lichen, and found from Penn- 

 sylvania (Muhlenberg), Hoffm. D. Fl. 1796, northward to New- 

 foundland, Despreaux ; and southward to the mountains of the 

 Carolinas, and Georgia (Ravenel). In this fprm the fibrous glom- 

 erules and fringe so common in the European plant are now ob- 

 servable. 



Fam. 4. PEL'TIGEKEI. 



Thallus piano-ascendant, frondose-foliaceous, coriaceous- 

 membrauaceous, beneath more or less villous, and marked 

 now with veins, and now with little cups or heaps (cyphels). 

 Gonimous layer varying in structure j the green cells com- 

 posing it being now of the ordinary sort (gonidia) and now 

 of the blue-green, gelatinous sort (gonimia). 



Fries, Meyer, and Eschweiler have taken their Peltigera 

 (equivalent to our Peltigerei excluding Sticta) for the highest 

 exhibition of the foliaceous type in Lichens. And if Sticta, to 

 which Meyer gave the second place and Ny lander now assigns 

 the first, be added, it will be easy to regard the family before 

 us as constituting the true centre of the Parmeliacei. 



Peltigera is readily seen to be very close, on the one hand to 

 Solorina, and on the other to Nephroma ; and the latter stands 

 in most intimate and unquestioned affinity to Sticta. 



