72 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
thalline margin persistent and entire or also beset with fine thalline granulations; 
epithecium subgranulose, pale sordid yellowish; thecium 100 to 120 p high, colorless; 
paraphyses adglutinated; hypothecium sordid yellowish, lighter than the epithecium, 
20 to 25 » high; asci subinflated-clavate; spores fusiform, 6-locular, 36 to 60 » long, 
5 yt thick. 
On rocks, Santa Monica Range. 
3. Collema glaucophthalmum Nyl. 
Thallus black green, closely adhering except the ascendant, entire margins, undu- 
late, deeply round-lobed, the upper surface rugulose and tuberculate, beneath lacu- 
nose and somewhat paler; apothecia generally numerous, sessile to elevated, 0.25 to 
0.75 mm. wide; disk flat, soon convex and the at first thin regular margin disappear- 
ing, the pruina giving a purplish or whitish bloom to the disk; epithecium subcon- 
tinuous, yellowish brown; thecium 84 to 92 4 high, colorless to pale amber; paraphyses 
adglutinated, strict, hardly thickened at apices; hypothecium amber color, about 
40 » high; spores long fusiform, plurilocular, 40 to 56 # long, 4 to 5 u thick; septa faint 
but more numerous than in the last preceding species; asci clavate, nearly as high 
as the thecium; hymenial gelatine blue with iodine. 
On bark of oaks in canyons of the Santa Monica and San Gabriel Ranges, 
4. Collema fasciculare Ach. 
Thallus blackish green, forming small orbicular cushions 2 to 3 cm. in diameter, 
composed of erect, clavate or dilate-fanshaped fascicles 1 to 1.25 mm. high; apothecia 
numerous, sessile, one to several on the upper border of the lobule; disk primarily 
flat, then strongly convex, dull reddish, when moist of a light brick red, the thalline 
margin entire or crenulate; epithecium continuous, reddish brown, gradually paling 
downward; thecium 60 » high, colorless, toward the circumference pale reddish; 
paraphyses adglutinate, slightly clavate at the colorless tips; asci clavate; hypothe- 
cium pallid, about equaling the thecium in height; spores 8, fusiform, mostly 
4-locular, with globules in the cells, 18 to 26 4 long, 6 to 7 je thick, outlines of the 
spores inclined to be unsymmetrical; hymenial gelatine with iodine blue. 
On barks, Santa Monica Range. 
5. Collema coccophorum Tuck. 
Thallus black, forming patches 2 to 3.5m. wide, composed of small, aggregated, 
clavate lobules, 1.5 to 2 mm. high, coalescing toward the periphery in thin flat 
lobes 2 to 3 mm. wide with entire border, the upper surface beset with stout granules, 
the pedicellate lobules and flat lobes adhering to the substrate by a few slender 
rhizine; apothecia subsessile or innate; disk reddish black, at first concave, then 
flat, the thalline margin crenate; epithecium continuous, dark reddish brown; 
thecium 68 to 100 » high, colorless; paraphyses coherent; hypothecium colorless or 
pale amber; asci clavate, 60 » long, 15 p thick; spores 8, ovoid-ellipsoid, bilocular, 
slightly constricted, one end acuminate, 20 p to 24 p long, 7 to 9 » thick, the loculi 
with oil globules; with iodine the asci stained blue, the paraphyses yellow, the 
hypothecium not changed. 
On earth near Murietta Hot Springs; at Palm Springs and Topanga Canyon of the 
Santa Monica Range. 
6. Collema cheileum Ach. 
Thallus greenish black, foliaceous, lobes small, loosely imbricated, about 1 mm. 
wide, round, entire, undulate-plicate, and toward the base of lobule warty; apothecia 
innate, one in a lobule; disk reddish, flat with an at first erect thalline margin, entire 
or crenulate, or with minute round lobules; epithecium subentire, handsome dark 
brown; thecium 136 to 152 » high, colorless; paraphyses loosely coherent, simple, 
entire, not thickened nor colored at the tips; hypothecium very faintly colored, 
