HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 129 
rare with us, small, sessile; disk planoconvex, black, naked, the thalline margin entire, 
persistent; epithecium subcontinuous, yellowish gray; thecium 60 to 84 high, color- 
Jess, iodine staining it blue, as also, but not s0 readily, the epithecium and hypo- 
thecium; paraphyses loosely coherent, the septation not distinct; hypothecium color- 
less; asci inflated-clavate; spores 8, ellipsoid, brown, bilocular, 17 to 22 4 long, 8 to 
‘U1 » thick, the lumina flat-obcordate with an isthmus. 
On rocks and bark, through North and South America and Europe. 
This and Physcia stellaris vary in width and division of laciniz and are similar 
‘slants, but, distinguishable by the different chemical reaction. The thalline margin 
-s well supplied with gonidia that also continue under the hypothecium. 
3. Physcia astroidea (Fries) Nyl. 
Thallus stellate-orbicular, appressed, microphylline at the periphery, the central 
part merged into a continuous mass of soredia; thalline medulla yellow with KHO, 
the yellow reaction with calcium chloride (Crombie) failing with us, dark beneath, 
thizinee few and short; apothecia rather few, often absent; disk concave, black, pruinose; 
thalline margin erect, persistent, entire or lightly crenulate; epithecium subcontinu- 
ous, pale yellowish gray; thecium colorless, 84 to 96 » high; paraphyses loosely coherent, 
the tips thickened and colored; hypothecium about the color of the epithecium, but 
slightly paler; asci clavate; spores 8, oblong-ellipsoid, 12 to 21 » long, 7 to 10 » thick, 
brown, bilocular, the epispore thin, the lumina round. 
On bark, preferably that of Juglans californica, in the Santa Monica Range and at 
Highland Park near South Pasadena. It is reported throughout the United States 
and from southern Europe into Africa. 
4. Physcia crispa (Pers.) Nyl. 
Thallus orbicular, appressed, whitish, laciniate-radiate, the lacinize broadly linear, 
convex, toward the periphery palmately cleft, spreading and dilating, the final divi- 
sions flattened and imbricate, beneath pale with few, short, white rhizine, KHO 
staining the surface yellow, Ca(Cl0),—; apothecia sessile, from 0.25 to 1 mm. wide; 
disk flat, black, the thalline margin persistent, entire or finely crenulate; epithecium 
subgranulose, brown; thecium colorless, 40 « high, blue with iodine including the 
epithecium and hypothecium; paraphyses coherent, with globular brown heads, 
furcation or septation not seen; hypothecium almost colorless (a faint yellow tinge); 
asci inflated-clavate; spores 8, ellipsoid, brown, bilocular, 13 to 24 » long, 6 to 10 « thick, 
generally not constricted ; sterigma articulate, constricted; spermatia 4 to 6 # long, a 
little over 1 » thick, straight. 
On bark of Juniperus, on the desert slope of the San Bernardino Range. Occurs 
in eastern United States; recorded from Polynesia. 
5. Physcia adglutinata (Iloerke) Nyl. 
Thallus orbicular, small, sordid greenish gray or pale olive green, closely appressed, 
the lacinix discrete or contiguous, sparingly divided, mostly merging into a sorediate 
state; very rare in fruit with us, the spores 14 to 22 » long, 8 to 11 # thick. 
On various barks; frequent on Juglans californica in the Santa Monica Range. 
Becoming conspicuously fresh green after rains. Throughout the United States; 
also in Europe. 
6. Physcia hispida (Schreb.) Tuck. 
Thallus small, white to silvery gray, the narrow, stellately arranged laciniz sepa- 
rate, loosely adherent to suberect, the ends of the more or less palmately cleft lacinize 
“vaulted and inflated,” particularly the central ones, the peripheral inclining more 
to a spatulate, crenulate termination, the border of the lacinia loosely beset with 
spreading dark fibrils, beneath pure white, mealy; apothecia sessile, small, not 
excecding 1.25 mm. in width; disk flat, black, naked or densely pruinose; thalline 
margin entire, erect; epithecium subcontinuous, brown; thecium colorless; para- 
