l.ICIIKNS OF IOWA. tj^ 



iited in Towa, which must be rare elsewhere. Only one 

 specimen like it was found in the Tuckerman herbarium. 

 The apothecia are usually white pruinose and the exciple is 

 whitish. It is cpiite common on IJiiiiiis. 



P. CERiNUM {Hcdiv.) Xacg. and JIvpp.. var. i-vk^acka ^VxL 

 Old boards. Fayette. l'lo\ d. 



P. CERINUM [Hcdzc. \ -AWi,'-. and Ifcf>p., lar. sidkritis Tuck. 

 Granitic rocks. Fayette, l^remer. Johnson. 



P. FERRUCJINEUM [J/llds.] Ilcpp.. VaV. POELINII Tlick. 



Trees. Fayette. Johnson. 



P. viTELEiNUM [Elir/i.] ^Vao^.and Ilcpp. Dead wood and 

 rocks. Fayette. 



P. viTEELiNUM [^E]irh. ) ^A'^/^;i,''. and Ilcpp. var. aurellum 

 . AcJi. Calcareous rocks. Fayette. Johnson. Linn. 



LECANORA {^Ach.) Tuck. 



L. RFBixA (17//.) Ac/i. Granitic rocks. Fayette. I^remer. 



L. RFBixA (17//.) ^Ick., var. iieteromorpiia Ac/t. (jran- 

 itic rocks. Fayette, Bremer. 



L. MURALis [Sc/ircb.') Schicr.. var. saxicola Sc/ncr. Gran- 

 itic rocks. Favette. Bremer. 



L. MURAEis [Sc/ircb.] Sc/ncr.. var. \'f.rsicoeor Tr. Gran- 

 itic rocks. Fayette, Winneshiek. 



L. PALi.iuA [Sc/irc/).) Sc/ncr. Trees. Fayette, Clayton. 



L. SUBFUSCA {T.) Ach. Trees and rocks. Fayette, Bre- 

 mer, Clayton, Shelby, Johnson. Linn. Winneshiek. 



L. SUBFUSCA (Z.) AcJi., var. aulophaxa Ac/i. Trees. 

 Fayette. 



L. SUBFUSCA (/..) Ach.. var. argentata Ac/i. Trees. 

 Favette, Linn. Johnson. 



