32. CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
curved 4-locular, 28 to 36 # long, 4 to 6» thick, one end long-attenuate, the two end 
cells longer than the two central; apothecia sessile, round, from 0.3 to 0.5 mm. wide, 
the flat, densely white-pruinose disk surrounded by a thin, black, crenulate proper 
margin, markedly contrasting with the pruinose disk when moistened, the pruina 
disappearing later and the disk then black and planoconvex. 
Type on Salix lasiolepis, Rustic Canyon in the Santa Monica Mountains. 
Type deposited with Dr. A. Zahlbruckner; duplicate in herb. Hasse. 
2. Lecanactis californica Tuck. 
Thallus whitish cream-colored, furfuraceous, minutely areolate to verrucose; 
determinate, with a black hypothalline border, KHO+ light yellow, Ca(ClO),—; 
apothecia sessile, round to angular or oblong and (rarely) even to broadly lirellate; 
disk flat to convex, whitish pruinose or epruinose and black, the persistent proper 
margin black, crenulate, carbonaceous; epithecium subcontinuous, yellowish brown; 
thecium colorless, 74 to 80 # high; paraphyses loose, some forked once or twice below 
the clavate-thickened grayish apices; hypothecium dark brown black, carbonaceous; 
asci clavate, extending upward to the colored epithecium; spores colorless, in 8’s, 24 
to 28 » long, 5 to 6 » thick, fusiform, blunt-ended, 4-locular, straight or mostly a little 
curved; with iodine the epithecium and upper part of thecium reacting blue, the 
lower part with ascus membranes and spores a rich yellow. 
Widely distributed over our district on various barks, but mostly found in proximity 
to the coast. Santa Catalina Island, Newport, Santa Monica Mountains, Del Mar, San 
Diego, etc. 
SCHISMATOMMA Flot. & Koerb. 
Differing from Lecanactis in having a turgid lecanorine margin surrounding the 
apothecia, the spores also generally more narrowly fusiform; spermatia acicular, 
straight or curved. 
KEY TO SPECIES. 
Growing on bark. 
Spores 10 to 14-locular................ cece eee eee eee eee 1. S. pluriloculare. 
Spores 4-locular... 2.22.22... eee eee eee eee eee eee 3. S. californicum. 
Growing on rock .. 2.22.22... eee eee ee ee eee 2. S. hypothallinum. 
1. Schismatomma pluriloculare Zahlbr. in Engl. & Prantl, Nat. Pflanzenfam. 
1'*; 116, 1907, 
Platygrapha plurilocularis Zahlbr. Beih. Bot. Centralbl. 18: 156. 1902. 
Thallus crustaceous, epiphlceodal sordid whitish, pulverulent, subverruculose, 
rimulose, limited by a black hypothalline border, KHO—, Ca(ClO),-+reddish; apo- 
thecia sessile, numerous and generally crowded, with a prominent, turgid, coarsely 
crenulate, now and then difform, lecanorine margin, giving the apothecia an urceolate 
appearance; disk flat, black; epithecium granulose, pale dingy yellow grayish to pale 
brown; thecium not quite colorless to pale brownish, 84 to 88 » high, stainng yellow 
with iodine; paraphyses coherent, interwoven, some forked above, not thickened or 
colored at the tips; hypothecium dark brown black; asci broadly ellipsoid, 88 j« long, 
26 # thick, the membrane somewhat gelatinous; spores in 6’s or 8’s, fusiform, colorless, 
48 to 52 4 long, 4 to 6 » thick, 10 to 14-locular, the loculi somewhat unequal, the spores 
straight or lightly curved; spermogones acicular, lightly curved, 16 to 20 1 long, less 
than 1 y thick. 
On Rhus integrifolia. Type locality, Santa Catalina Island. It has also been found 
on Santa Barbara Island by Mrs. Blanche Trask. 
Type deposited with Dr. A. Zahlbruckner; duplicate in herb. Hasse. 
2. Schismatomma hypothallinum (Zahlbr.). 
Platygrapha hypothellina Zahlbr. Bull. Torrey Club 27: 645. 1900. 
Thallus white, mealy, thick, effuse, convolute-rugulose, KHO—, Ca(ClO),+ red; 
apothecia innate and sessile, round, often crowded and then irregularly round or 
