2Q2 BOTANICAL GAZETTE [APRIL 
44. PARMELIA PUBESCENS (L.) Wainio. 
45. LETHARIA VULPINA (L.) Wainio. 
46. XANTHORIA POLYCARPUS (Ehrh.). 
47. XANTHORIA LYCHNEUS LACINIOSA (Schaerer).—The speci- 
mens are sterile but well marked, and grow on the north slope of a 
rhyolite cliff. 
48. BLASTENIA FERRUGINEA (Huds.) Arn. 
49. CALOPLACA ELEGANS (Link.) Th. Fr. 
50. CALOPLACA ELEGANS TRACHYPHYLLUM Tuck. 
51. CALOPLACA MURORUM (Hoffm.) Th. Fr. 
52. CALOPLACA CINNABARINA (Ach.) A. Zahlbr. 
53. BUELLIA ALBO-ATRA (Hoffm.) Th. Fr. and var. SAXICOLA 
54. BUELLIA TRIPHRAGMIA Ny]. 
55. RINODINA THYSANOTA Tuck. 
56. RINODINA OREINA (Ach.) Mass. 
57. PHYSCIA PULVERULENTA (Hofim.) Nyl.—Specimens scanty 
and sterile. 
58. PHyscia STELLARIS (L.) Nyl. 
59. Puyscta TRIBACIA (Ach.) Tuck. 
It is doubtful whether one should include Letharia oul pina as 
really belonging to the desert flora. In the western Sierras It 15 @ 
very abundant and conspicuous lichen, but seems hardly able . 
withstand the drying winds of high velocity so characteristic of 
the western Nevada region. On Peavine Peak, at an altitude of 
7000 feet, I found two small sterile specimens growing on the butt 
of a scraggly Cercocarpus. But as already stated, where there are 
groves of juniper it occurs in abundance, probably because there 3 
is sheltered from the high winds which prevent its development ™ 
more exposed situations. 
Parmelia pubescens occurs at about 7500 feet on Peavi 
and also very sparingly on a cold north wall, where it is well s 
from the sun, at an altitude of 5000 feet. But it is really a plant 
of the high Sierras and cannot be reckoned as a real factor In the 
desert lichen flora. 
This leaves us with 57 species and subspecies which we may 
safely include in the flora of the desert about Reno. Of this num 
heltered 
