46 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
35. Lecidea subplebeia Nyl. sp. nov. in litt. 
Crust dull white, pulverulent, rimose-areolate, effuse, KHO—, Ca(ClO),—, no 
reaction of the medulla with iodine; thallus now and then slightly rugulose; apothe- 
cia closely adnate, small, 0.25 to 0.5 mm. in diameter, dispersed; disk black, slightly 
convex in the fully developed apothecia; proper margin thin, black, persistent; the- 
cium 48 to 60 » high; paraphyses coherent, septate, with small, globular, dark heads; 
hypothecium pale fuscous, not horny; asci clavate; spores in 8’s, ovoid-ellipsoid, 9 
to 12 long, 6 to 7 » thick. 
On adobe soil and small pebbles, foothills of the Santa Monica Range. Type 
locality above ‘‘ Brown’s Lake,’’ near the Soldiers’ Home. 
Type deposited with Dr. W. Nylander in 1897; duplicates with Dr. A. Zahlbruck- 
ner and in herb, Hasse. 
36. Lecidea globifera Ach. 
Thallus squamulose, fawn color or red to greenish red, paling at the edges and 
beneath, more or less closely imbricated, ascending to erect, not over 1 mm. wide, 
entire or round-lobed; apothecia sessile, the disk globose, purplish black, papillate, 
emarginate; epithecium yellowish brown; paraphyses adglutinate, not sharply de- 
fined; thecium sordid brown; hypothecium brown, paler than the epithecium; 
asci clavate; spores in 8’s, ovoid-ellipsoid, 8 to 13 y long, 5 to 7 » thick. 
On earth, frequent and widely distributed. San Bernardino, Parish; foothills of 
the Santa Monica and San Gabriel ranges; Palm Springs and the adjoining Colorado 
Desert. 
The squamules of the desert forms are of darker brown color and the surface is 
fissured to rugulose. 
37. Lecidea luridella (Tuck.). 
Biatora luridella Tuck. Gen. Lich. 156. 1872. 
Thallus of small squamules (0.5 to 2 mm. wide), round or sinuate-lobed, loosely 
imbricated, brown red, white pruinose at the circumference and pale beneath, form- 
ing roundish patches from 2.5 to 4 cm. wide, KHO—, Ca(ClO),—; apothecia sessile, 
minute, central, mostly solitary, 0.5 to 0.8 mm. in diameter, the disk planoconvex, 
dark brown, the margin obsolete; epithecium granulose, pale ocher color; paraphyses 
coherent; thecium 60 to 68 high; hypothecium paler than epithecium or colorless; 
asci inflated-clavate; spores in 8’s, ellipsoid and oblong-ellipsoid, 8 to 12 » long, 4 
to 6 » thick; hymenial gelatine stained pale blue with iodine. 
On earth; Castle Rock Park, Santa Cruz Peninsula, Herre; frequent on open grassy 
foothills of the Santa Monica Range near the Soldiers’ Home; grassy plains at Muri- 
ette Hot Springs, Riverside County; Santa Catalina Island. 
38. Lecidea friesii Ach. 
Thallus scantily represented, of approximate, not contiguous, minute, dark dun- 
colored glebee; apothecia appressed, minute, black, convex and slightly roughened, 
internally dark, the margin obscure; epithecium continuous, brown; thecium sordid 
pale brownish, 98 » high; spores in 8’s, ellipsoid, 8 to 9 » Jong, 3.5 to 4 # thick; hymenial 
gelatine with iodine pale sordid blue. 
On carbonized bark in Mill Creek Canyon, San Bernardino Mountains at 1,500 meters 
altitude. Northeastern United States; northern Europe. 
39. Lecidea decipiens (Ehrh.) Ach. 
Thallus of discrete or crowded squamules, rotundate or lobulate, concave, peltately 
affixed, brick red to brown, whitened at the periphery (in exposed situations, as in 
the desert, often fissured), flat or ascendant, 2 to 4 mm. in diameter; apothecia sessile, 
marginal, 0.25 to 1 mm. wide; disk planoconvex, brown black, papillate, the margin 
soon excluded, the disk finally globose and not seldom conglomerate; epithecium 
yellowish brown; paraphyses adglutinate; thecium pale and yellowish; hypothecium 
