304 BOTANICAL GAZETTE [way 
I have included more than one species, but as the more aberrant 
forms do not have fertile asci I cannot place them elsewhere. 
Varying in color from a clear saddle brown to black-brown. Much 
infested by a parasitic fungus which causes black, morbid, 
apothecia-like growths. 
3. Lecidea plana Lahm.—lIdentification doubtful, but agrees 
in all essentials. 
4. Gyrophora rugifera (Nyl.) Th. Fr. old on the south 
side of ledges at 10,800 ft. and for several hundred feet below; not 
found on the north side of the mountain. Growth luxuriant, but 
very rarely fertile. 
5. Gyrophora reticulata (Schaer.) Th. Fr. —Excessively abundant 
from 8000 ft. upward. Occurring in all kinds of situations and 
forming the dominant lichen. Rather variable, but all forms may 
be referred to this species, whether typically foliose or reduced to 
a dense, uniform, crustaceous rock covering. According to the 
investigations of Dr. R. HEBER Howe, who has recently examined 
the lichen types of the Linnaean Herbarium, Lichen deustus of 
LINNAEUS is really G. reticulata, which therefore becomes a synonym 
of G. deustus (Lin.) R. H. Howe. 
6. Acarospora chlorophana (Wahlb.) Mass. 
7. Acarospora cervina (Pers.) Koerber. 
8. Acarospora thermophila Herre, n. sp.—Thallus somewhat 
orbiculate to effuse, areolate and fissured, of small lobulate squam- 
ules which are more or less stalked or stipitate beneath, the 
clustered stalks often branched, their height reaching 7 mm. 
Surface of squamules imbricate-lobate, the lobes very small, except 
marginally where they may be slightly expanded. Upper surface 
a pale yellow-brown or clay-brown; beneath black. No reactions 
visible. 
Apothecia rare, small to medium, solitary or several grouped 
together, their surface more or less roughened and wrinkled, or 
sometimes fissured; an evident narrow thalline margin present; 
-epithecium yellow-brown; hypothecium yellowish or very pale 
brownish; thecium colorless, turning to very deep blue with [; 
paraphyses simple, not septate, subcoherent, slender, their tips 
not enlarged; asci broadly clavate or top-shaped, measuring 24 .8- 
