96 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
1. Lecania dimera (Nyl.) Olivier. 
Thallus thin, whitish, forming small, roundish, smooth patches from 0.5 to 1.5 cm. 
in diameter, occasionally finely granular, fringed by: a pallid hypothallus; apothecia 
minute, biatorine; disk flattish to convex, light brown and darkening; epithecium 
granulose, light brown; thecium 60 to 64 » high; paraphyses free, not septate, light 
brown at the tips; asci narrowly clavate, 8-spored; hypothecium colorless or tinted 
faint yellow; spores oblong-ellipsoid, bilocular, straight or slightly curved, 12 to 16 lt 
long, 4 to 4.5 » thick; reaction with iodine blue. 
On smooth bark of Juglans californica. 
Canyons of the Santa Monica Range. 
2. Lecania erysibe (Ach.) T. Fries. 
Thallus of dispersed or loosely congregated, light ash-colored or whitish pulveru- 
ent, small squamules, scarcely exceeding 0.5 mm. in width, KHO—, Ca(ClO),—; 
apothecia numerous, scattered, sessile, 0.3 to 1 mm. wide; disk flat, soon convex with 
a delicate bloom, occasionally tuberculate, light brown to light blackish brown, 
mostly paling toward the circumference, at first with a thin, crenulate thalline margin 
this at last disappearing; epithecium subcontinuous, dingy yellowish; thecium color- 
less, 68 to 88 whigh, staining blue with iodine; paraphyses subcoherent; hypothecium 
dingy pale yellowish; spores oblong, simple or bilocular, 12 to 16 fe long, 4.5 to 5 pt 
thick. 
On calcareous sandstone, Topanga Canyon of the Santa Monica Range; on a similar 
substratum at Newport Bluffs; on bleached bones on San Nicolas Island, Trask. 
3. Lecania turicensis californica Zahlbr. Beih. Bot. Centralbl. 13: 159. 1902. 
“A planta typica (Hepp. Flecht. Europ. no. 8) differt thallo epilithico haud evoluto, 
apotheciis parum minoribus, normaliter pruinosis, madefactis fuscis et sporis angus- 
tioribus, 10 to 12 » longis et 3.5 to 4 p latis.”’ 
On calcareous rock, Santa Ynez Canyon of the Santa Monica Range. 
The only specimen found was deposited with Dr. A. Zahlbruckner and the piant 
has not been collected since. 
4. Lecania toninioides Zahlbr. Beih. Bot. Centralbl. 18: 160. 1902. 
Thallus an ash gray squamulose crust; squamules small, roundish, angular or sinuate- 
lobate, concave, contiguous and subimbricate, the border whitish: apothecia dis- 
persed, adnate-sessile to sessile, 1 to 1.5 mm. wide; disk flat to lightly convex, at times 
slightly depressed in the center, dusky grayish with a faint bloom, the thalline margin 
whitish, thin, entire, becoming obsolete; epithecium subgranulose; thecium pallid, 
70 to 90 » high; paraphyses coherent, not septate, tips clavate, brownish: hypothecium 
pale; asci oblong-clavate, equaling the thecium in height; spores 8, fusiform-oblong, 
bilocular, straight or lightly curved, 15 to 20 m long, 4 to 5 uw thick; spermatia hook- 
shaped, 16 to 20 » long, about 1 » thick. 
On clay. Type locality, Ballona Bluffs, near Santa Monica. 
Type deposited with Dr. A. Zahlbruckner; duplicate in herb. Hasse. 
5. Lecania brunonis (Tuck.) Herre, Proc. Washington Acad. Sci.12: 188, 1910. 
Lecanora brunonis Tuck. Gen. Lich. 116, 1872. 
Thallus of small verruce or flattening to squamules forming an areolate crust, green- 
ish gray to greenish brown, at times the squamules round or crenulate, contiguous 
or imbricate, the color darkening to dull greenish black, KHO—, Ca(ClO).—; apothe- 
cia adnate-sessile; disk brown to dull blackish, concave to flat, the thalline margin 
crenulate and sinuate, finally obscure; epithecium umber brown, continuous, paling 
downward ; paraphyses strict, coherent, some forked below the globular heads; thecium 
colorless or pale yellowish, 100 » high; hypothecium amber color; asci inflated-clavate, 
80 to 86 » high; spores 8, bilocular, oblong-ellipsoid, 12 to 20 » long, 4 to 7 ue thick; 
hymenial gelatine with iodine intense blue; spermatia hook-shaped, 16 to 24 # long. 
