HASSE—LICHEN FLORA OF SOUTHERN CALIFORNIA. 
KEY TO SPECIES. 
Section 1. EULECIDEA T. Fries. 
Substratum bark. 
Thallus smooth, gray......----------++-+------ee2 eee 
Thallus not smooth, squamulose to whitish gray. .... 
Substratum rock. 
Thallus obsolete. 
Proper margin (exciple) black. 
Sinuate; disk opaque, black........-------- 6. 
Crenate; disk velvety black. .....-.. eeeeee 9. 
Proper margin (exciple) gray and fissured....... 7. 
Thallus present. 
Thallus squamulose. 
Squamules dark brown to black. 
Approximate. ......-.-....+-+eeeee eee 1. 
Not approximate. .............--+--+--+- 4, 
Squamules lighter colored. 
Light brown. 
Polished, bright chestnut brown.... 2. 
Not polished, light brown.......... 3. 
Not light brown. 
Yellowish. 
Grayish yellow to fawn color.... 13. 
Pale ochroleucous, mealy....... 5. 
Some shade of gray. 
.Well developed.........--.----- 10. 
Not well developed. ....-..-.-- 11. 
Thallus not squamulose. 
Thallus globular-verrucose. 
Verrucee whitish to grayish. 
Pale ash color........----e-eee ee eee 8. 
Whitish......--.....0-------------- 18. 
Verruce pale yellow. 
Thallus giving no reaction with 
Thallus with KHO-+yellow. 
Thalline verruce globular. 
Crenate or sublobulate...... 17. 
Not crenate nor sublobulate. 18c. 
Thalline verrucee flattened. 
Light gray. ..........----- 18b 
_Not gray. 
Light yellow........... 16. 
Cream color. .......--- 18a. 
Thallus not globular-verrucose. 
Granulose and disappearing, sordid 
within .............222.2 22sec ee eee 19, 
Rimose-areolate, gray. 
Proper margin (exciple) conspicuous... 14. 
Proper margin (exciple) less conspicu- 
35 
L. euphorea. 
L, elabens. 
. diducens. 
. vorticosa, 
. cinerata. 
SoS 
L. atrobrunnea. 
L. fumosa. 
L. protabacina. 
L. fuscatoatra. 
. atrolutescens. 
. hasset. 
hm 
. platycarpa, 
. lithophila, 
Sw 
. lapicida. 
. enteroleuca, 
Nh 
L, brandeget. 
L. catalinaria, 
L. enteroleuca pilu- 
laris. 
_L. enteroleuca 
aequata, 
LL. latypaea. 
L. enteroleuca theio- 
placa, 
L. goniophila. 
L. plana. 
L. tessellata. 
