tort] HERRE—DESERT LICHENS 291 
I have a specimen collected by C. G. PriNcte in the Santa Rita 
Mountains, Arizona, in 1884, and another collected by Dr. W. G. 
Fartow at El Paso, Texas, and both named by TUCKERMAN in 
litt. My material from Reno agrees with both of these specimens. 
All three are sterile, but on the sheet to which the one from 
Arizona is fastened is written the spore measurements quoted by 
me above, presumably copied from TuCKERMAN’s findings of other 
and fertile material. 
29. HEPPIA GUEPINI (Delis.) Nyl. 
30. LEcANoRA GrBBOSA (Ach.) Nyl.—Part of the specimens are 
hot at all typical and probably represent a new variety. 
31. LEcANoRA CALCAREA (L.) Sommert. 
32. LECANORA OLIVACEA (Bagl. & Car.) Steiner (?).—The 
4-6 
spores o Q 
po f my material measure but 8.1-9.3 
material they measure 5-6 #; in other respects the plant seems 
10-14 
to agree. 
33- LECANORA SAXICOLA (Poll.) Ach.—Our Nevada material 
is excessively variable and some forms are brought under this 
species with great difficulty. A brown, white-pruinose form is 
very common and may represent TUCKERMAN’S var. versicolor, or 
it may be new. 
34. LeEcANora sp.—This lichen belongs to the saxicola group, 
but I am unable to determine it more closely. Intermediate 
between Z. saxicola and L. thamnoplaca, but quite distinct from 
either, ae 
#, while in European 
35- LECANORA THAMNOPLACA Tuck.—Very abundant on loose 
rocks and on cliffs. 
6. LECANORA MELANOPHTHALMA (DC.) Jatta. 
37- LECANORA RUBINA (Vill.) Ach. 
38. LECANORA RUBINA HETEROMORPHA Ach. 
39- CANDELARIELLA CERINELLA (Flk.) A. Zahlbr. 
40. PARMELIA GLABRA Schaerer. 
t. PARMELIA EXxAspERATA (Ach.) Nyl. 
42. PARMELIA CoNsPERSA (Ehrh.) Ach. : 
3- PaRMetta (?).—Too fragmentary for determination. On 
, Shaded, north slopes. 
w 
oO 
- 
4 
cold 
