88 



Genus 2. 

 Genus 3. 

 Genus 4. 



P. molyhdaea cronia Nyl. 



= Collema molyhdium var. 



cronia (Nyl.). 

 P. languinosa (Ach.) Koerb. 

 P. byssina (Hoffm.) Tuck. 



= Dichodium byssinum 



(Ach.) Nyl. 

 P. nigra (Huds.) Nyl. 



= Placythium nigrum 



(Huds.) S. Gray. 

 P. rubiginosa (Thunb.) Delis. 



P. leucosticta Tuck. 



P. microphylla (Sw.) Delis. 

 P. lurida (Mont.) Nyl. 



= Physma lurida Mont. 

 Hydotheria venosa Russ. 

 Parmeliella (see Pannaria). 

 Placyrthium (see Pannaria). 



Sus. 



t., r. 



C; 

 C; 



Pal. 

 Cam.: 



Hack. 



C; Hack. 



Newf.; Ulster Co., N. Y.; 



Shadaken, Pa. 

 C; Newf.; Weehawken, 



N.J. 

 C. 

 C; Pal.; Cam.; At.; N. 



Y. C; Newf. 

 C. V. under water. 



d. w. 



Genus i. 

 Genus 2. 



Genus i. 



Family 12. Gyrophoraceae 



Gyrophora (see Umbilicaria). 

 Umbilicaria vellea (L.) Nyl. C. 



= Gyrophora vellea (L.) 

 Ach. 

 U. Dilleni Tuck. Sus. 



= G. Dilleni (Tuck.) Miihl. 



Arg. 

 U. Muhlenbergii (Ach.) Tuck. C; Sus. 



= G. Muhlenbergii (Ach.) 



Schneid. 

 U. papulosa Tuck. Rockland Co. 



= U . pustulata papulosa 



Tuck. 

 U. pustulata (L.) Hoffm. 



U. Pennsylvanica Hoffm. 



U. hirsuta (Ach.) Stenh. 



= G. hirsuta (L.) Ach. 



Family 13. 

 Lecidea contigua Fr. 

 L. enteroleuca Ach. 

 L. granosa Tuck. 



= Toninia granosa {Tnck.). 

 L. tessellina Tuck. 



Garrison's; Washington 

 Heights, N. Y. C; 

 'Morris Pond, N. J. 



Sus.; Mat.; Pa. 



Cat. 



Lecidiaceae 



C.;St. Id.; Ja. 

 C; Cat. 

 C. 



C. 



Common. 



r., bricks. 



