68 CONTRIBUTIONS FROM THE NATIONAL HE 
Disk flat or rarely somewhat convex, 
dark brown to black... .. Lee eeeeeee 11. 
Thallus granular, but never areolate or subareo- 
late. 
Thallus becoming chinky. 
Disk flat or somewhat convex, pale to 
reddish brown or black.:........... 6. 
Disk becoming very convex, pale yel- 
lowish to reddish brown or black... 7. 
Thallus not chinky. 
Granules very minute; apothecia 
Granules larger. 
Granules. large; apothecia middle- 
sized, from flesh-color to oliva- 
ceous and black............... 3. 
Granules middle-sized; apothecia 
small, rusty-brown, passing 
through sanguineous to black.. 8. 
Thallus not usually sea-green nor ashy. 
Thallus usually brown or brownish, 
Thallus forming an inconspicuous, evanescent 
crust; apothecia small or minute, pale flesh 
color and darkening..................--..-- 9. 
Thallus plainly granular, persistent. 
Thallus often tardily subareolate; apothe- 
cia small or minute, brown to black.... 13. 
Thallus never becoming subareolate. 
Thallus thicker, greenish-olivaceous 
to rusty-brown or darker; apothecia 
emall or minute, brown or brownish 
RBARIUM. 
L. panaeola. 
LL. matabilis. 
LL. vernalis. 
. L. viridescens. 
LL. granulosa. 
LL. sanguineoatra, 
LL. carnulenta. 
LL. myriocar pordes. 
black -. 22... ..0.00.....2222222--- 12. L. uliginosa. 
Thallus thinner; apothecia and spores 
smaller than in the above.......... 12a. L. uliginosa ful- 
igined. 
Thallus greenish or yellowish. 
Thallus granular, tardily becoming chinky. 
Apothecia commonly flat, or becoming 
convex, very minute, pale yellowish to 
brown or black................ ... 14. 
Apothecia commonly convex, twice as 
large as in the last, brown or black. .... . 15. 
Thallus granular, not becoming chinky. 
Apothecia olivaceous or black, minute... 16 
Apothecia pale lemon to brownish, small 
or minute....................---.-.4.-. 17. 
LL. varians. 
LL. quernea. 
. £. flavidolivens. 
L. lueida. 
Section II. Exciple and hypothecium horny, usually dark-colored (Eulecidea). 
On rocks. 
Thallus whitish or whitish ashy, becoming chinky 
and areolate; apothecia immersed or adnate, reach- 
ing middle size, black................2...2-2-.-2---- 24 
Thallus ashy, sea-green, or rarely olivaceous. 
Thallus minutely scurfy-granular; apothecia min- 
ute, black......2..2 22200. ..00 2 0c e cee ee ee eens 26 
. DL. speirea. 
. DL. cyrtidia. 
