92 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
thalline margin in the mature apothecia finely crenulate; epithecium continuous, 
reddish brown, gradually fading downward, the color disappearing after KHO; 
thecium colorless, 96 to 128 » high; paraphyses strict, loosely coherent or well sepa- 
rated, some with clavate and pale colored tips, septate (after KHO); hypothecium 
pale yellowish; asci clavate; spores 8, ovoid-ellipsoid, 12 to 18 « long, 6 to 11 p thick; 
hymenial gelatine blue with iodine, soon reddish brown. 
On rocks, sandstone bowlders; San Bernardino Mountains, in Mill Creek Canyon, 
at 1,500 meters altitude. 
15. Lecanora albella (Pers.) Ach. 
Thallus cream color, becoming more yellow or dun color, smoothish, finely rimose, 
KHO-+ yellow, Ca(ClO),—; apothecia sessile, 0.5 to 2 mm. wide, often crowded and 
from pressure difform; disk flat or undulating, flesh-colored and white-pruinose; 
thalline margin stout, entire to flexuous and even sinuate, persistent; epithecium 
granulose, pale grayish yellowish; thecium 80 to 100 » high, colorless; paraphyses 
loosely adglutinated, septate after KHO; hypothecium colorless; asci inflated-clavate, 
72 by 20 »; spores 8, ovoid, 12 to 18 p» long, 6 to 10 » thick; hymenial gelatine deep 
blue with iodine. 
Frequent on various barks; Santa Catalina Island, Baker; Santa Monica and San 
Gabriel Ranges; San Bernardino Mountains, Parish. 
The variety cancriformis Tuck. has a rougher, verruciform thallus and difform 
apothecia with the thalline margin irregular, sinuate-lobate. It occurs with the species. 
16. Lecanora varia (Hoffm.) Ach. 
Thallus effuse, pale yellowish greenish to pale buff, thin, areolate-verrucose or 
granulose, KHO+yellow, Ca(ClO,)—; apothecia numerous and often crowded, not 
exceeding 1 mm. in width, sessile; disk from flat to convex, yellowish greenish and 
buff with a delicate bloom, with a thin crenulate and flexuose thalline margin, later 
becoming obsolete; epithecium continuous, hyaline; thecium colorless, 56 to 60 it 
high; paraphyses coherent; hypothecium with a very faint yellowish tinge; asci 
clavate, reaching the height of the thecium; spores 8, oblong-ellipsoid, 11 to 14 It 
long, 5 to 6 « thick; the entire hymenium blue with iodine, KHO—. 
Frequent on various barks. Santa Cruz Peninsula, Herre; near San Bernardino, 
Parish; Santa Catalina Island. 
16a. Lecanora varia illusoria Ach. 
Thallus absent; apothecia sessile; disk buff to pale brown, flat to convex and 
biatorine. 
Near San Bernardino, Parish. Determined by the late Doctor Stizenberger. 
17. Lecanora polytropa (Hoffm.) Schaer. 
Thallus obsolete; apothecia sessile, from 0.25 to 1 mm. wide, crowded or dispersed; 
disk flat to convex, reddish brown, the thalline margin very thin, becoming obsolete; 
epithecium subcontinuous, grayish yellow and yellowish brown; thecium 60 to 100 
high, sordid pale yellowish or nearly colorless; paraphyses subcoherent, strict, not 
thickened at the apices; hypothecium of the same hue as the thecium: asci clavate; 
spores 8, bluntly ellipsoid, 9 to 13 » long, 5 to 6 # thick; hymenial gelatine with iodine 
dark sordid blue or violet blue. 
On sandstone and conglomerate, Santa Monica Range and Ballona Bluffs. 
18. Lecanora symmicta Ach. 
Thallus thin, granulose or pulverulent, KHO+yellow, Ca(ClO),-+-orange (the last 
reaction faint on the specimens collected); apothecia sessile, numerous, small, none 
over 0.25 mm. wide; disk convex, light rusty brown; thalline margin obsolete 
(biatorine); epithecium subgranulose, colorless; thecium colorless; 44 to 48 high, 
paraphyses loosely coherent; hypothecium colorless; asci clavate; spores 8, ellipsoid, 
