HASSE—-LICHEN FLORA OF SOUTHERN CALIFORNIA. 127 
thick, bilocular, brown, the lighter grayish colored spots round, some with indication 
of an isthmus. 
On oaks in the San Gabriel Range at and above 800 meters elevation. 
This has been sent by A. S. Foster from Westport, Washington, with a marked 
dull black hypothalline border and a somewhat darker thallus than the southern 
Cslifornia lichen, growing on Alnus; also from the Santa Cruz Peninsula by A. C. 
Herre, the latter conforming in thallus and hypothallus to the southern lichen. 
12. Rinodina roboris (Dufour) T. Fries. 
Crust subdeterminate, whitish ash color, granular and chinky, KHO+ yellow, 
Ca(ClO),—; apothecia generally numerous, sessile, 0.25 to 1 mm. wide; disk soon 
convex, brown black, the proper margin lighter in color and the thalline margin at 
last disappearing; hypothallus indistinct; spores the full size of those of Rinodina 
sophodes. 
On various barks, dead wood, and fences. Frequent in the lowlands and ascending 
the mountains. 
PHYSCIACEAE. 
Thallus foliaceous, appressed, passing to the fruticulose state and then ascending, 
mostly attached by means of rhizine, corticate and in general outline orbicular, the 
gonidia Pleurococcus; apothecia sessile, lecideine or lecanorine; paraphyses simple; 
asci with 8 spores, -these brown, bilocular, rarely in exotic forms 4-locular to sub- 
muriform; sterigma jointed; spermatia straight, short. 
KEY TO GENERA. 
Cortex of upper surface evolved from upright hyphe. 
Apothecia lecideine; disk with KHO+purple......--..--- PyXInE (p. 127). 
Apothecia lecanorine; disk with KHO—.......--.-------- Puyscra (p. 128). 
Cortex of upper surface formed of longitudinal hyphe; apo- 
thecia lecanorine..........-..--------ee- eee cree eee eee ANAPTYCHIA (p. 131). 
PYXINE Fries. 
Apothec1um becoming lecideine; thallus similar to that of Physcia, appressed, 
both the dorsal and ventral surfaces corticular, the hyphe of the former vertical to the 
thalline surface, the lower cortex less developed and having longitudinal hyphe; 
epithecium staining violet with KHO; spores as in Physcia. 
1. Pyxine sorediata (Ach.) Fries. 
Thallus appressed, orbicular, creamy white, radiately rugulose toward the cir- 
cumference, deeply lobed, the lobes contiguous, flattening, the border coarsely 
crenate, the lobes beset, particularly at the center, with soredia, KHO-+yellow, 
C'a(C1O),—, beneath white with grayish rhizine; apothecia few and rarely present, 
adnate-sessile, lecideine, not over 0.5 mm. wide; disk flat, brown black; proper 
margin concolorous, persistent, entire; epithecium subgranulose, gray; thecium 
colorless, 72 to 76 high, with iodine blue (epithecium and hypothecium not stained); 
paraphyses free, with globular blackish heads, now and then forked above, the septa- 
tion indistinct; hypothecium brown; asci clavate; spores 8, narrowly ellipsoid, pale 
brown to reddish brown, bilocular, 12 to 20 « long, 4 to 7 p thick, constricted, the epi- 
spore thin, the loculi often unsymmetrical in size, one being larger than its mate. 
On dead and living Sambucus glauca, also on Juglans californica; rarely on rocks. 
Not uncommon in valleys and foothills, but very seldom with apothecia. Recorded 
sis found throughout the United States east of the Rocky Mountains; also from Europe, 
tiouthern and oriental Asia (Japan), Africa, and Oceania; southern Mexico, Orcutt. 
