162 PRELIMINARY CATALOGUE OF PLANTS. 



Peltigera, (Willd., Hoffm.,) Fee. 

 P. aphthosa, Hoffm. 

 P, canina, HofFm. 



Var. spuria, Ach. 

 P. polydactyla, Hoffm. 

 P. rufescens, Hoffm. 

 P. horizon talis, Hoffm. 

 P. venosa, Hoffm. 



Pannaria, (Del.,) Tuckm. 



P. lanuginosa, (Ach.,) Kbr. 



P. lurida, Nyl. 



P. microphylla, (Sw.,) Del. 



P. leucosticta, Tuck. 



P. molybdsea, Pers. 



Var. cronia, Nyl. Sussex Co. 

 P. nigra, (Huds.,) Nyl. 

 P. byssina, (Hoffm.,) Tuck. 



Ephebe, Fries., Born. 

 E. pubescens, Fr. 

 E. minor, Willey in litt. 



Collema, (Hoffm.,) Fries., Flot. 



C. myriococcum, (Ach.,) Nyl. Sussex Co. 



C. pycnocarpum, Nyl. 



C. cyrtaspris, Tuck. 



C. microphyllum, Ach. 



C. verruciforme, Nyl. 



O. leptaleum, Tuck. 



C. flaccidum, Ach. 



C. nigrescens, (Huds.,) Ach. 



C. ryssoleum, Tuck. 



C. pulposum, Ach. 



C. furvum, Ach., Nyl. 



Leptogium, Fries., Nyl. 

 L. subtile, Nyl. 

 L. lacerum, (Sw.,) Fr. 

 L. pulchellum, Ach., Nyl. 

 L. tremelloides, Fr. 

 L. chloromelum, (Sw.,) Nyl. 

 L. myochroum, (Ehrh., Schrser.) 

 Var. saturninum, (Dicks.,) Tuck. 



