206 The Botanical Gazette. [ April, 
original specimen in herb. Swartz says in Lich. Argent. 64 
that he cannot distinguish it from his P. verszcolor Beitr. 
n. 315, from New Holland, and refers Krempelhuber’s plant to 
a distinct species, P. subcongruens. 
16. P. ISIDIOCERA Nyl. Syn. 1: 382.—This occurs in arctic 
America. ‘‘Affinis P. aurulenta.” 
17. P. SPHHROSPORELLA Miiller Beitr. . 2650.—Thallus 
appressed ochroleucous, rugose beneath, pale yellowish, and 
with pale fibrils. Apothecia at length plane, the disk from 
flesh-colored becoming livid-fuscous. Spores globose, diam. 
.005-.007"".—On trees, Oregon, Dr. Lyall, in herb. Kew. 
18. P. ACETABULUM, Me. K yellow then red, occurs in 
arctic America. Most of the Parmelias of the brown series 
give no reaction. 
New Bedford, Mass. 
