262 IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



CLASS LICHENS. 



Sub-Oeder Coxiocaspixb.e. 

 Family Caliciaceae. 

 Cyphclhun tigillare (Pers.) Th. Fr. On old board fence near 

 High lake. 



SuB-ORDEK GRAPHID1NE.E. 



Family Graphidacese. 



Phccgraphis dcndritica (Ach) Muell. Eng. Collected on dead 

 Primus virginiana. Common at High lake. 



Arfhonia radiafa (Pus.) Ach. On bitternut, "Cedar Island," Mud 

 lake. Other specimens of Arthonia collected on bitternut near High 

 lake, on wild plum near Mud lake, on willow in Estherville woods, 

 have not been satisfactorily determined. 



Slts-Ordek Discocarpine.e. 

 Family Lecidiacese. 



Lccidca mclanchc'nna Tuck. On bitternut. High lake; also on 

 cedar post ; prairie south of High lake. 



BitcUia myriocarpa (D. C.) Mudd. On old wood. High lake. 



Family Cladoniaceae. 



Cladonia sylvatica (L.) Hoffm. On old stump in High lake 

 woods ; very rare. 



Cladonia baciUaris (Del.) Nyl. On decayed stump. High lake. 



Cladonia cristatclla Tuck. On old stumps at High lake and 

 Estherville. One specimen marked by Miss Miller as "approaching 

 var paludicola Tuck, but without soredia on primary squamules." 



Cladonia niifnila Tuck. On soil; woods west of Estherville. 



Cladonia vcrticillata Hoffm. On old stump; High lake. 



Cladonia vcrticillata ccrvicornus (Ach.) Flat. On old stump; 

 High lake. 



Cladonia pyxidata ncglccta (Floerte) Mass. On earth; abundant 

 in Estherville woods. 



Cladonia fimhriata (L.) Hoffm., var. subiilata (L.) W'ainio. On 

 old stump near High lake and on earth on high ridge, west of 

 Estherville. 



Family Pannariaceae. 



Pannaria micro phylla (Sw.) Moss. On prairie bowlder near Des 

 Moines river. 



Pannaria lanuginosa (Ach.) Koerb. On dead wood near Mud 

 lake. 



