— oe 
. 
15 
P. pulverulenta (Schreb.) Nyl. N. Mexico; Mr. Fend- 
ler. Rocky Mountains, (muscic.) Dr. Hayden. 
P. speciosa (Wulf., Fr.) var. hypoleuca, Ach. Valley of 
Rio Grande; Mr. Wright. Var. galactophylla, Tuck. 
With the last. Var. leucomela, Eschw. Coast of 
Calif. ; Menzies. New Mexico; Dr. Parry. 
P. stellaris (L.) a. Coast; Mr. Bolander. Rocky 
Mountains; Dr. Parry. N. Mexico; Mr. Fendler. 
Var. (tribacia) Fr. Coast; Mr. Bolander. Var. his- 
pida, Fr. With the last. 
PyxIneE Cocoes (Sw.) Nyl., var sorediata, Tuck. Rocky 
Mountains; Hook. herb. 
Fam. 3. Umbilicariet, Fee. 
Umsiticaria floceulosa, Hoffm. Rocky Mountains ; 
Hook. herb. 
U. hyperborea (Ach.) Hoffm. Rocky Mountains ; Hook. 
Herb. 
U. cylindrica (L.) Delis. Rocky Mountains; Dr. Hay- 
den. Dr. Parry. 
U. proboscidea (L.) DO. Rocky Mountains; Dr. Parry. 
U. phea (sp. nova) thallo cartilagineo monophyllo len 
Suscescente, subtus papilloso nudo nigro ; apothecus ap- 
pressis dein prominulis gyroso-proliferis, margine tenur 
subevanescente. Spore minute, e globulari ovoideo- 
ellipsoidee, simplices, subincolores, diam. fere duplo 
longiores. Rocks on the coast; Mr. Bolander. Com- 
parable as respects size with U. erosa. 
U. murina, (Ach.) DC.? Rocky Mountains. Mr. Hall. 
U. hersuta (Ach.) DO. N.W. Coast; Douglas. Rocky 
Mountains; Mr. Hall. 
