HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 67 
On earth and crumbling sandstone. Type locality, foothills of the Santa Monica 
Range near the Soldiers’ Home. Widely distributed in the State; Santa Cruz Penin- 
sula, Herre; Santa Catalina Island; Mill Creek Canyon, San Bernardino Mountains; 
Palm Springs at foot of San Jacinto Mountains. 
Type deposited in the U. S. National Herbarium; duplicates in the herbarium of 
New York Botanical Garden, with Dr. A. Zahlbruckner, and in herb. Hasse. 
A parasite inhabits occasionally the thallus of A. obpallens. Small black, globular, 
sessile, erect bodies on the surface of the squamules, the perithecium dark brown 
black, parenchymatous, the inner membrane apparently colorless; asci obliquely 
lanceolate, 40 to 44 » long, 14 « thick; spores 8, colorless, bilocular, 11 to 12 « long, 
3.5 to 4 « thick; paraphyses absent. 
10. Acarospora squamulosa (Schrad.) T. Fries. 
Crustaceous, brown, of flat or convex, rounded and sublobulate or entire, crowded 
or dispersed squamules, beneath whitish, KHO—, Ca(ClO).—; apothecia impressed, 
small; disk flat, black, with a thick, entire thalline margin; epithecium continuous, 
light brown; thecium 120 ” high; paraphyses separate or loosely coherent, not thick- 
ened nor colored at the tips, simple, entire; hypothecium colorless, equaling the 
thecium in height; asci saccate, 100 » long, 24 » thick; spores very minute and numer- 
ous; hymenial gelatine blue then brown with iodine. 
On various rocks. Frequent in the Santa Monica Range. 
11. Acarospora rufescens (J. E. Smith) T. Fries. 
Thallus of light or dark chestnut brown squamules, these crowded and imbricated or 
more dispersed, wavy and lobate in outline, undulate, not closely adnate to the sub- 
stratum, somewhat shining, beneath black, no reaction with KHO or Ca(ClO).; apo- 
thecia immersed, small, flat to at last larger and concave, reddish brown; epithecium 
continuous, pale straw color; thecium colorless, about 120 » high; paraphyses stout, 
about 2 « thick, loosely coherent, entire, simple, not or but slightly thickened at apices 
and finally tinted pale yellow; hypothecium colorless or with a faint yellow tint and 
equaling the thecium in height; asciinflated-clavate, 100 to 116 u long, 26 to28 thick, 
membrane much thickened at upper part; spores very minute and numerous, oblong, 
3 to 4 p long, 1 thick; hymenial gelatine pale blue, the hypothecium darker and the 
ascus contents greenish yellow with iodine. 
On granite, San Bernardino Mountains at 3,000 meters altitude; Santa Cruz Moun- 
tains, Herre \ 
12. Acarospora fuscata (Schrad.) Arnold. 
Thallus crustaceous, Jark brown, rimose-areolate, beneath dark; apothecia innate; 
disk primarily small, at last enlarging and occupying nearly the entire areole, from 
concave to flat and level with the thallus, dark brown; epithecium yellowish brown 
to brown, continuous; thecium 92 to 96 y high, colorless; paraphyses moderately stout, 
loose but adglutinate at the tips, these scarcely thickened, yellowish brown; hypo- 
thecium pale amber color; asci inflated-clavate, the membrane thickened above, 
nearly reaching the epithecium; spores very minute and numerous; hymenial gela- 
tine with iodine blue, the epithecium remaining unstained; thecium soon greenish 
blue, the hypothecium persistently blue. 
On rocks. From various localities in the Santa Cruz Peninsula, Herre; on sand- 
stone in the Santa Monica Range. Arctic America and northern United States; 
Europe. 
13. Acarospora aeruginosa Hasse, sp. nov. 
Thallus squamulose, the squamules flattened-convex, contiguous or dispersed, clay- 
colored, 0.25 to 0.5 mm. wide, KHO (Ca(ClO),)—, semitranslucent when moist; 
apothecia central, immersed ; disk depressed, flat, pale greenish or pale bluish pruinose, 
about 0.1 to 0.15 mm. wide; epithecium granulose, colorless; paraphyses capillary, 
