20 
LECANORA thamnitis (sp. nova) thallo papillato-fruticu- 
oso, truncis pluribus teretiusculis fastigiato-ramosis in 
crustam verrucosam viridi-stramineam ewspitoso-stipa- 
tis; apothecus majusculis terminalibus subpodicellatis, 
disco pallido-luteolo, margine demum crenato. Spore 
ex ovoitleo ellipsoidew, simplices limbate 1. (sporobl. 
dein disrupto) sub-dyblaste, diam. 2-2} plo longiores. 
Sandstone rocks, with the last; Mr. Bolander. Evyo- 
lution of the thallus, which rather exceeds a quarter 
of an inch in height, comparable with that of Cladonia 
papillaria. Apothecia not unlike those of L. pinguis, 
and in some respects similar also to those of L. rubina ; 
the largest having a diameter of two lines. The 
papillose crust of L. aypospda (Wahl.) Ach., and that 
of L. poliophea (Wahl.) Ach., pass into a flat, more or 
less radious, common margin, of which there is no 
trace here. 
L. rubina (Vill.) Scher., a. (L. chrysoleuca, Ach.) Roeky 
Mountains; Dr Hayden. New Mexico; Mr. Fendler. 
Var. opaca, Ach. Rocky Mins; Dr. Hayden. 
L. muralis (Schreb.) Scher. (L. saxicola, Ach.) Coast; 
Mr. Bolander. ; 
L. pinguis, Tuck. Coast; Mr. Bolander. 
L. varia (Ehrh.) Ach. Coast; Mr. Bolander. 
L. pallescens (L.) Scher. Coast; Mr. Wright. Dr. 
Lyall. Rocky Mountains; alp.; Mr. Hall. 
L. pallida (Schreb.) Scher... (L. albella, Ach.) Coast; 
Mr. Wright. 
L. glaucoma (Hoffm.) Ach. Coast; Mr. Bolander. 
LZ. Cenisia, Ach. Coast; Mr. Bolander. 
LL, subfusca (l.) Ach., ff. Coast; Mr. Wright. 
L. atra (Huds.) Ach. Coast ; Mr. Wright. 
Lecanora fecunda (sp. nova) thallo contiguo diffraeto- 
rimoso albo (detrito chrysogonimico-aurantiaco ;) apeth- 
