X 
HASSE—LI¢ « SOUTHERN CALIFORNIA. 65 
On sandstone and _xs, Santa Cruz Mountains, Herre; San Bernardino 
Mountains, Parish; .cnt in the Santa Monica Range, mostly at lower altitude 
than the last prece .ag species. Eastern and southern United States and throughout 
the Pacific Coast States; in the petrified forest of Arizona, 
Form dealbata Tuck, with flat to convex white squamules and a black disk, occurs 
sparingly on argillaceous rocks in the Santa Monica Mountains. 
8. Acarospora schleicheri Mass. 
Crust of yellow or greenish yellow squamules, generally crowded, flat or rugose, 
lobate or coarsely crenate, forming round patches from 2 to 5 cm. in diameter, no 
reaction with KHO or Ca(Cl0),; apothecia innate, 0.25 to 1 mm. wide; disk flat to 
barely convex, brownish black, papillate with a crenate thalline margin; epithecium 
continuous, yellowish brown; thecium 92 » high, colorless or tinted faint yellow; 
paraphyses strict, coherent; asci inflated-clavate, 68 to 72 yu high, thickened at top; 
spores minute and numerous, globose, 3 to 4 # in diameter; hymenial gelatine with 
iodine blue, turning brown. 
On earth; Santa Monica and Verdugo Ranges at lower elevations; Point Loma near 
San Diego; Santa Catalina Island; Elsinore, Riverside County; San Bernardino, 
Parish. Western United States; Europe; northern Africa. 
4, Acarospora peltasticta Zahlbr. Beih. Bot. Centralbl. 18: 161. 1902. 
Thallus of round subglobular, dull ivory white squamules, 2 to 4 mm. wide, rimose- 
areolate, the areole angular, pyramidal or truncate, erect, no reaction with KHO or 
Ca(ClO),; apothecia one to several in a squamule, immersed, small, the disk black; 
epithecium continuous, light yellowish brown; thecium colorless, about 120 pu 
high; paraphyses slender, coherent and adglutinated at the apices and these scarcely 
thickened or colored; hypothecium yellowish; asci oblong-ellipsoid, about equaling 
the thecium in height, the membrane but little thickened above; spores small, numer- 
ous, spherical, oval or obovoid, 4 to 5 # in diameter or 5 p long, 3.5 p thick; hymenial 
gelatine with iodine blue, the thecium sordid yellow green, the epithecium not 
affected by the reagent, the hypothecium staining persistently blue. 
On crystalline rocks. San Nicolas Island, Trask; on granite at the base of the San 
Jacinto Mountains, near Palm Springs (the type locality); at Elsinore, Riverside 
County; Grand Canyon, Arizona. 
Type deposited with Dr. A. Zahlbruckner; duplicate in herb. Hasse. 
5. Acarospora epilutescens Zahlbr. Beih. Bot. Centralbl. 13: 161. 1902. 
Thallus of turgid, semiglobose squamules, round or oblong, 1 to 2 mm. wide, con- 
tiguous or dispersed, whitish, ashy or light steel gray or light brown latterly, and 
white-suffused above, the squamules often marked by black fissures and short black 
ramifying or radiating capillary lines, giving the thallus to the naked eye a dark appear- 
ance, KHO—, Ca(ClO),—; epithecium continuous, yellowish or brownish yellow to 
brown; thecium 120 to 170 y high, colorless; paraphyses thin, loosely adglutinated, 
pale yellow and barely thickened at the tips; hypothecium colorless or very faint 
amber color, about one-quarter the height of the thecium; asci oblong-ellipsoid; 
spores minute and numerous, globular and ovoid, 3.5 # long, 2.5 to 3 p thick; hymenial 
gelatine with iodine blue, the thecium dark blue, the epithecium remaining unstained. 
On granite. Type locality, Palm Springs at the eastern base of the San Jacinto 
Mountains. 
Type deposited with Dr. A. Zahlbruckner; duplicate in herb. Hasse. 
6. Acarospora reagens Zahlbr. Beih. Bot. Centralbl. 13: 162. 1902. 
Thallus squamulose, white and white pruinose, lobed at the circumference, cen- 
trally rimose-areolate, turgid, KHO+ brick red, Ca(ClO).=, medullary hyphe with 
iodine —; squamules discrete but often contiguous and forming white patches on the 
ground; apothecia round, one or more in a squamule, innate or slightly elevated 
