FINK—THE LICHENS OF MINNESOTA. 109 
Podetia corticate. 
Podetia straw-colored, whitish, or sea-green. 
Podetia not conspicuously squamulose, at least not 
throughout. 
Tips straight and subulate. 
Tips usually brown...........-.2.....-0.2.0....----- 10. C. amaurocraea. 
Tips rarely brown. 
Tips usually subulate; podetia stout... - . Dec cee eee ll. C. uneialis. 
Tips short and obtuse; podetia stout.............. lla, C. uncialis obtus- 
ata. 
Tips often recurved; podetia longer and more slender... 12. C. furcata. 
Podetia usually more or less squamulose throughout. 
Tips and whole branches irregular..................... l2c. C. furcata_finkii. 
Tips and branches not irregular. ............2.2.2.---- l2d. C. furcata pin- 
nata, 
Podetia not always straw-colored or sea-green, 
Podetia brownish or olive-brown above...............-- l2b. ©. furcata para- 
doxa. 
Podetia sea-green to reddish brown or olivaceous......-- - 13. C. ertspata. 
Section IV. Apothecia brown; primary thallus usually persistent; podetia for most 
part simple, or little branched. 
Podetia becoming long. 
Podetia always corticate. 
Cortex continuous or closely areolate. 
Podetia usually cupless; tips short-branched........... 19. CC. turgida. 
Podetia cup-bearing. 
Proliferations from the centers of the cups.........- 25. C. verticillata. 
Proliferations in part from the margins of the cups 
and the sides of the podetia..................... 25a, C. verticillata cer- 
vicornis. 
Cortex continuous to scattered, areolate. 
Podetia sorediate between the scattered areoles. 
Podetia sometimes squamulose toward the base, com- 
monly cup-bearing. ........222---.-222------- 23. C. gracilis. 
Podetia squamulose throughout; cups more irregu- 
lar... eee eee eee eee 23a. C. gracilis dilacer- 
ata. | 
Podetia subtomentose between the scattered areoles, 
middle-sized, cylindrical or: turbinate, ‘sometimes 
squamulose and often cup-bearing.............-..- 24. ©. degenerans and 
two subspecies, 
a and b. 
Podetia not always corticate. 
Podetia frequently becoming partly or almost wholly de- 
corticate. 
Podetia plainly squamulose. 
Squamules small... ......0.2.2.22020020000000000.. 15, C, squamosa. 
Squamules larger. .........2.-.-----2-------------- 15b. C. squamosa phyl- 
locoma. 
Podetia not plainly squamulose. 
Podetia almost destitute of squamules.............. Iba. C. squamosa mul- 
tibracteata, 
Podetia squamulose-scaly..........22.------------ 14. C. subsquamosa. 
