HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA, 33 
difform; disk flat to convex, white-pruinose, surrounded by a thick thalline margin; 
epithecium brownish, gradually paling downward; thecium pale sordid yellowish to 
brownish, 86 to 100 » high, stained a dark red by iodine; paraphyses coherent and 
closely interwoven; hypothecium dark brown black; asci oblong, subcylindric, reach- 
ing to the colored epithecium; spores in 8’s, fusiform, colorless, 24 to 30 » long, 4 to 5p 
thick, with a gelatinous halo, 8-locular, the loculi equal in length. 
Type from Santa Catalina Island on calcareous rock, Trask. San Clemente Island, 
same collector; on the mainland near Newport on sand rock. 
Type deposited with Dr. A. Zahlbruckner, of Vienna; duplicates in the U. 8. 
National Herbarium, with Dr. A. C. Herre, and in herb. Hasse. 
8. Schismatomma californicum (Tuck.) Herre in litt. 
Dirina californica Tuck, Lich. Calif. 17. 1866. 
Thallus whitish ash-colored, rugose, effuse; apothecia sessile, crowded; disk black 
and thickly white-pruinose, surrounded by a turgid, wavy or crenulate thalline 
margin; epithecium granulose, pale to brownish; thecium colorless, stained blue by 
iodine; paraphyses closely coherent and intricate; hypothecium thick, dark brown 
black; asci clavate; spores dactyliform, 4-locular, 15 to 19 » long, 3 to 4 » thick. 
Sparingly in the Santa Monica Mountains on Quercus agrifolia. 
DIPLOSCHISTACEAE. 
Thallus crustaceous, uniform, subverruculose; apothecia round, immersed or 
appressed; disk generally small, concave to flat, surrounded by a proper and a lecano- 
rine margin; paraphyses simple or forked above; asci 4 to 8-spored, the spores muri- 
form, dark; gonidia recognised as Protococcus. 
The family is represented with us only by one genus. 
DIPLOSCHISTES Norm. 
KEY TO SPECIES. 
Disk sessile, broadly concave, black. 
Medulla with iodine blue..............-...-.-------------- 1. D. scruposus. 
Medulla with iodine giving no reaction ................-... 2. D. gypsaceus. 
Disk immersed, small, brown...............---2---0-- eee eee ... 3. D, actinostomus. 
1. Diploschistes scruposus (L.) Norm. 
Characters as above. Thallus light gray to dark ash color, areolate-rimose and ver- 
ruculose, the surface pulverulent, KHO—; Ca(ClO),+red, the medulla also red, with 
iodine the medulla staining blue; apothecia innate, small to large (1.6 mm.); disk 
concave to flattish, dull black, more or less whitish pruinose, the proper margin darker 
than the disk, surrounded by a persistent thalline margin; epithecium brown; thecium 
colorless, 80 to 84 » high; hypothecium sordid whitish, no reaction of the hymenial 
gelatine with iodine; spores brown, 4 to 8 in asci, muriform, oblong-ellipsoid, the 
transverse septa 5 or 6 with 1 to 3 fainter ones in the longitudinal spore axis; spore 
wall slightly contracted at points of septation, 28 to 36 » long, 14 to 16 y thick. 
Cosmopolitan. Frequent throughout our territory. On earth or earth-covered 
rocks. Santa Cruz Mountains, Herre; San Diego, Orcutt; San Bernardino, Parish; 
Santa Monica Mountains; Santa Catalina Island. 
The species is somewhat changeable according to the different hosts. In the 
variety bryophilus Ach. the thallus is whitish, thinner, and less rugulose. Over- 
running mosses and Cladoniae. In the variety parasiticus Sommerf., the thallus is 
obsolete or disappearing. In both varieties the apothecia are smaller than in the 
type. These forms occur occasionally in the Santa Monica range growing over 
Cladonia pyxidata and C. tubaeformis. 
