HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 25 
dark orange; paraphyses interwoven; hypothecium reddish brown; asci clavate to 
oblong-ellipsoid; spores in 8’s, fusiform, colorless, 24 to 28 long, 6 to 7 » thick, 5- 
locular; after application of KHO surrounded by a halo. 
On Umbellularia californica, Malibu Canyon, Santa Monica Mountains. 
3. Opegrapha prosiliens Stirton. 
Thallus thin, sordid pale yellowish gray, in small oval patches; hypothallus indis- 
tinct; epithecium subcontinuous, a narrow black border; thecium colorless, 80 p 
high; hypothecium pale brown to brown; paraphyses branching, loosely interwoven; 
asci clavate, 72 « long, 20 » thick; spores in 8’s, ellipsoid with a broad, distinct halo, 
20 to 26 # long, 6 ta 7 4» thick, 4-locular, the two end cells smaller than the two central; 
with iodine the thecium and asci staining yellow, the epithecium and hypothecium 
dark brown. 
On dead Lycium californicum near Newport, Orange County. 
4. Opegrapha atrorimalis Nyl. 
Thallus sordid pale yellowish, determinate by a thin blackish hypothalline border; 
apothecia sessile, simple, straight, linear; thecium rimeform; epithecium granulose, 
pallid, yellowish gray to brown; thecium pallid, 64 to 80 » high; paraphyses laxly 
coherent; hypothecium brown to blackening; asci inflated-clavate, 44 to 60 » long, 16 
to 22 » thick, the membrane slightly thickened above; spores bluntly fusiform or 
oblong-ovoid, 20 to 24 » long, 6 to 9 » thick, with a thin halo, 4-locular; hymenial 
gelatine with iodine brownish yellow. 
On various smooth barks in the Santa Monica Range. 
5. Opegrapha pulicaris (Hoffm.) Nyl. 
Thallus whitish to dirty white; apothecia small, ovoid to ovoid-ellipsoid, simple; 
disk slightly dilated; epithecium granulose, sordid whitish; thecium 60 to 64 » high, 
pallid; asci cylindric, about 60 » long by 14 » thick; spores fusiform, 24 to 28 » long, 
4 to 5 » thick, 6-locular; hymenial gelatine with iodine pale yellowish red. 
Santa Catalina Island on bark of Rhus integrifolia, and frequent in the Santa Monica 
Range on various barks. 
6. Opegrapha rimalis Pers. 
Thallus thin, sordid whitish, indeterminate; apothecia linear-elongate, small; epi- 
thecium sordid yellowish; thecium dingy white, 88 « high; hypothecium dark brown- 
ish black; hymenial gelatine with iodine vinous red; spores fusiform, 20 to 28 y long, 
5 to 6 ye thick, 6-locular. 
On various barks on Santa Catalina Island and the mainland. 
7. Opegrapha diaphora Ach. 
Thallus pale ash-colored, furfuraceous, epiphlcodal, continuous or becoming rimose; 
apothecia black, fusiform and acutish, the proper margin narrow, shining, some with 
a spurious thalline margin; disk flat, black; epithecium thin, yellowish black, paler 
than the hypothecium, gradually paling downward; thecium 92 to 96 « high, colorless, 
staining with iodine orange to vinous red, the stain darkest in the lower part, the 
epithecium assuming a violaceous tint; paraphyses coherent and interwoven; hypo- 
thecium dark yellowish black; asci clavate, nearly equaling the thecium; spores 8, 
fusiforra, 20 to 24 » long, 5 to 6 » thick; spermogones indicated by minute black dots; 
spermatia short, rod-shaped, slightly curved, 3 to 4 long, 1 to 1.5 y thick. 
On exposed roots of Rhus integrifolia, beach bluffs at White Point, near San Pedro. 
8. Opegrapha vulgata Ach. 
Thallus creamy white, effuse; apothecia numerous, small, roundish to oblong, 
linear, simple; epithecium rimeform; thecium colorless or pale yellow, 80 to 82 p 
high; paraphyses branched and loosely interwoven; hypothecium deep brown black; 
asci subcylindric, 44 to 50 » long, 14 to 18 » thick; spores narrowly fusiform, 6-locular 
