HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 131 
%b. Physcia pulverulenta subvenusta Ny!. 
Thalline margin crowned with lobules, this about the only difference from the 
species. On bark, occasionally with the species. 
Along the ‘Mormon Trail” below Skyland, San Bernardino Mountains, Reed; 
near ‘Lone Pine Mine” in the Tehachapi Mountains. 
fic. Physcia pulverulenta pityrea (Ach.) Nyl. 
Thallus smaller than the species, grayish to subcervine, the border of the laciniz 
sorediate-lined; sterile with us. 
On wood and mossy rocks in the Santa Monica and San Gabriel ranges. 
(id. Physcia pulverulenta isidiigera Zahlbr.; Herre, Proc. Washington Acad. Sci. 
7: 362. 1906. 
Thallus orbicular, thickened, appressed, of a somber brownish color, pruinose, the 
extremities of the lacinia visible, the body disguised by a dense growth of coralloid 
isidia; apothecia closely sessile; disk black, papillate, mostly epruinose; thalline 
rargin thickened with the dense isidia; spores ovoid-ellipsoid, 26 to 36 4 long, 10 to 
14 p» thick. 
The type was collected by A. C. Herre at Mayfield. On moss-covered, shaded 
rocks in the north fork of Matilija Canyon, Ventura County; San Jacinto Mountains at 
1,500 meters altitude, on bark of dead oak; Santa Ynez Canyon, Santa Monica Range. 
1.0. Physcia obscura (Ehrh.) Nyl. 
Thallus orbicular, dark gray to dark brown, the laciniz narrow, convex, palmately 
clivided outward, appressed, beneath black and thickly black-fibrillose; apothecia 
(rare with us) from 0.5 to 2 mm. wide, adnate-sessile; disk flat, black, epruinose; 
thalline margin entire, persistent; epithecium dark brown, granulose; thecium color- 
less, 124 » high, blue with iodine, then sordid greenish blue; paraphyses capitate and 
lightly colored above, septate; hypothecium faint brownish; asci elongated-clavate; 
spores 8, dark brown, oblong-ellipsoid, 16 to 30 long, 9 to 16 # thick, bilocular, the 
lumina top-shaped, attenuate toward the septum. 
On bark and mossy rocks; on bark in the Santa Monica Mountains; on decaying 
raoss on rocks in Yosemite Valley. Throughout the United States, extending to the 
Arctic region; in Europe, northern Africa, and New Zealand. 
ANAPTYCHIA Koerb. 
Thallus from foliaceous to subfruticulose, repeatedly laciniate, diffusely prostrate 
cr ascending, the lacinie generally narrow, flat or subcanaliculate, the upper cortex 
tough, resistant; apothecia round; disk dark, naked or pruinose; spores brown, 
bilocular. 
KEY TO SPECIES. 
With KHO the cortex yellow, the medulla unchanged.......... 1. A. erinacea. 
With KHO both cortex and medulla yellow.............--.-.- 2. A. lewcomela. 
‘|. Anaptychia erinacea (Ach.) Herre, Proc. Washington Acad. Sci. 12: 261. 1910. 
Borrera erinacea Ach. Lich. Univ. 499. 1810. 
Thallus erect and suberect, loosely branching, gray above, whitish beneath, the 
laciniw narrow below, dilating upward and becoming lobate, the border white, pul- 
verulent and ecorticate, KHO-+yellow, the medulla not staining, no reaction with 
calcium chloride; cortex arising from lengthwise running hyphe; medulla thin, of 
narrow, wavy hyphe, the gonidial layer on the whole nearer the lower surface, but 
changeable to middle or upper part; apothecia subpedicellate; disk black to pruinose, 
soon convex, the thin, entire margin then excluded; epithecium continuous, light 
reddish brown gradually paling downward; thecium 100 to 104 » high, pale reddish 
brown above, almost colorless below; paraphyses coherent, with clavate, colored tips; 
