HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 89 
uous, yellowish gray to smoky brown; thecium 100 to 128 y high, colorless; para- 
physes coherent; hypothecium colorless or faint yellowish tinted; asci ventricose; 
spores ovoid, 15 to 32 « long, 12 to 20 » thick, epispore thick; hymenial gelatine blue 
with iodine, soon changing to brown. 
On various rocks, Santa Cruz Peninsula, Herre; Santa Monica Mountains; Tehachapi 
Mountains at 1,300 meters; San Gabriel Mountains. Canada and the northern United 
States; Europe; Asia; Japan. 
4. Lecanora laevata (Ach.) Nyl. 
Thallus thin, smoothish, delicately rimose-areolate, the areole angular, sordid 
prayish, flat or slightly concave; hypothalline border dull black or bluish black, 
KHO—, Ca(ClO),—; apothecia small, punctiform to 0.5 mm. wide, immersed; disk 
concave, black, the thalline margin not or slightly elevated; epithecium pale dingy 
yellowish brown, subcontinuous; thecium colorless, 132 to 136 » high; paraphyses 
slender, loose, coherent at the apices; hypothecium colorless; spores ovoid, 24 to 28 
long, 16 » thick; hymenial gelatine dull blue with iodine. 
On siliceous pebbles in the Santa Monica Range and at Del Mar; on granite, San 
Antonio Canyon in the San Gabriel Mountains. Eastern United States; northern 
Asia; Europe. 
5. Lecanora glaucopsina Nyl.; Hasse, Lich. South. Calif. 12. 1898. 
Thallus crustaceous, squamulose, pale grayish greenish, subdeterminate; squam- 
ules rugulose, contiguous, and subimbricate, angular or with wavy outline, becoming 
lobulate at the border, loosely attached to the substratum, KHO—, Ca(ClO),—; 
apothecia innate or subinnate, often crowded, 0.25 to 0.8 mm. wide; disk flat, black, 
round or oblong, or by juxtaposition irregularly roundish, when moistened brick red 
as with a moistened Heppia, with a bluish black proper margin and an erect, per- 
sistent, entire or subcrenulate thalline margin; epithecium continuous, light brown- 
ish; thecium colorless, 140 » high; paraphyses septate, the tips slightly or not at all 
clavate nor colored; hypothecium colorless; asci ventricose or subventricose, with 6 to 
8 spores, these ovoid, 18 to 22 » long, 11 to 14 » thick; hymenial gelatine with iodine 
blue; spermatia acicular, straight, 20 to 22 » long and less than J » thick. 
On clay. Type locality, “‘Barton’s Peak,’’ Santa Monica Range. 
Type deposited with Dr. W. Nylander; duplicates with Dr. A. Zahlbruckner and 
in herb. Hasse. 
6. Lecanora praecrenata Nyl.; Hasse, Lich. South. Calif. 12. 1898. 
Thallus diffuse, dirty whitish, indeterminate, or absent; apothecia sessile, circular; 
disk flat, dusky brown with a white, regularly crenulate thalline margin, the crenules 
globular, uniform in size, necklace-like surrounding the disk, this margin persistent 
and slightly elevated; spores 4 to 6, globular, 20 » in diameter with finely granular 
contents and thin epispore; hymenial gelatine with iodine blue turning yellowish 
green, the spores yellow from the first. 
On decomposed granite. Type locality in the Santa Monica Range at “‘Barton’s 
Peak.”’ 
Type deposited with Dr. W. Nylander; duplicate in herb. Hasse. 
7. Lecanora atra (Huds.) Ach. 
The crustaceous thallus white, of more or less contiguous verruce, with a black 
hypothalline border, KHO+-yellow; apothecia sessile, from 1 to 3 mm. wide; disk 
black, soon convex, often glistening, with a persistent, entire or coarsely crenulate 
(Santa Catalina Island) thalline margin; epithecium continuous, bluish black, 
gradually paling downward and in places staining the thecium to near its base; the- 
cium 68 high; paraphyses coherent; asci clavate, 8-spored, spores broadly ellipsoid, 
12 to 13 » long, 8.5 » thick; hymenial gelatine with iodine blue; epithecium covered 
by a hyaline, continuous membrane, 2 to 4 » thick, sharply defined from the dark 
