94' GUIDE TO THE STUDY OF LICHENS. 



Formerly it was classified with another genus {Pyc- 

 nofhelia), which is not at all surprising because it cer- 

 tainly has few characters in common with most (7/a- 

 donias. 



2. Gladonia delicata. Primary thallus consists of 

 numerous medium sized, closely crowded lobes, 

 which are sometimes finely branched. Podetia short, 

 slender, sometimes branching above. Apothecia 

 medium, confluent. Disk convex, brown. Spores 

 rather small. 



3. Gladonia ccespiticia. Primary thallus well 

 developed, much cleft or irregularly branching. 

 Podetia very short or wanting. Apothecia medium. 

 Disk convex, brown. Spores comparatively numer- 

 ous and a little above the average in size. 



J/., Gladonia symphycarpa. Primary thalli well 

 developed, usually rounded, sometimes elongated, 

 branching inconspicuous, upper surface generally 

 convex. Podetia short, rather thick, slightly 

 branching. Apothecia well developed. Disk con- 

 vex, confluent, dark-brown. Spores rather large, 

 15/x X 3.5/A. 



5, Gladonia mitrula. Primary thalli usually 

 small, numerous, rounded, almost entire, sometimes 

 much enlarged and branching. Podetia from short 

 to medium, entire or rarely branching near the 

 apex. Apothecia medium to large, usually conflu- 

 ent. Disk convex, brown. Spores numerous. 



6. Gladonia pulchella. Primary thallus well de- 

 veloped ; lobes branched, elongated, slender. Podetia 

 somewhat elongated, branched toward the apex, bear- 



