LICHENS OF IOWA. *jtj 



P A N N A R I A Bclis. 



P. LANGUiNosA [Ac/i.) Kivrb. Shaded calcareous rocks. 

 Fayette, Winneshiek, Bremer, Clayton, Johnson, Linn. 



P. MiCROPiiVLLA {Szv.) Dclfs. Sandstone. Clayton. 



P. PETERSii Turk. Calcareous rocks. Favette. 



P. NIGRA [/liids.) J^yi. Calcareous rocks. Fayette, Bre- 

 mer, Clayton, Winneshiek. 



Earn. COLLEMEI. 



OMPHALARIA Bur. Mout. 



O. PUiA'iNATA JVyl. Calcareous rocks. Fayette, Johnson. 



O. UMBELLA Tuck. Calcarcous rocks. Fayette. 



COLLEMA {Hofm.) Fr. 



C. PYCNOCARPUM A^I. Dead trees in moist wooded ravines. 

 Fayette, Bremer, Clayton, Winneshiek. 



C. FLACCiDUM Ach. Trees and calcareous rocks. Fa\'ette. 

 Clayton, Linn. 



C PUi>posuM [Ber/iu.) A\'I. Calcareous earth and rocks. 

 Fayette, Claj-ton, Bremer. 



•C. TEN AX i^Siu.) Ach. Calcareous earth and rocks. Fay- 

 ette, Floyd. 



C. CRispuM Barr. Earth. Fayette, Winneshiek. 



C. PLiCATiLE Schcer. Calcareous rocks. Favette. Cla}-ton. 

 Johnson. 



C. FURVUM [Ach.) iVvI. Calcareous rocks. Fayette. 



C. PUSTULATU.M Ach. Calcareous rocks. Favette. 



