IOWA ACADEMY OF SCIENCES. 175 



Ephebe sp. On rocks. Socorro county, New Mexico, April, 

 1895. Coll., C. J. Herrick. The plant is sterile and shorter, 

 and more densely tufted than Ephebe pubescens Fr. 



Omplialaria pulvinata (Nyl. ) On limestone. Cole county, Mo. , 

 August, 1898. Coll., C. H. Demetrio. Sterile, but the habit 

 thoroughly characteristic as well as presence of Gloeocopsa as 

 the algal symbiont. 



Leptogium lacerum{Sw.)'Fr. On mosses along ledges. Cole 

 county Mo., August, 1898. Coll., C. H. Demetrio. 



Leptogium chloromelum (Sw.) Nyl.? On dead branches. Cole 

 county Mo., August, 1898. Coll., C. H. Demetrio. Sterile, 

 and upper surface densely granulate. 



Placodium elegans (Link.) DC. On limestone. La Crosse, 

 Wis., January, 1895. Coll., L. H. Pammel. 



Placodium cinnabarrinum (Ach.) Adz. On rocks. Socorro 

 county, New Mexico, March, 1895. Coll., C. J. Herrick. 



Placodium aurantiacum (Lightf.) Naeg. and Hepp. On rocks 

 and trees. La Crosse, Wis., January, 1895. Coll., L. H. 

 Pammel. 



Placodium cerinun I (Hedw.) Nasg. and Hepp. On trees. La 

 Crosse, Wis., January, 1894. Coll., L. H. Pammel. The 

 peculiar waxy-yellow form with some Pruinose apothecia; com- 

 mon on Ulmus. 



Placodium ferrugiueicni (Huds.) Hepp. On trees. La Crosse, 

 Wis., January, 1895. Coll., L. H. Pammel. 



Placodium vitellinum. (Ehrh.) Nseg and Hepp. On sandstone. 

 La Crosse, Wis., January, 1895. Coll., L. H. Pammel, and on 

 some substratum from Winfield, Kan., 1896. Coll., R. Dun- 

 levy. 



Lecanora subfusca (L. ) Ach. On trees. La Crosse, Wis. , Jan- 

 uary, 1895. Coll., L. H. Pammel. 



Lecanora varia (Ehrh.) Nyl. On trees. Emma, Mo., July, 

 1898. Coll., C. H. Demetrio. 



Lecanora calcarea (L.) Sommerf., var. contorta Fr. On lime- 

 stone. La Crosse, Wis., December, 1894. Coll., L. H. Pam- 

 mel. A widely distributed, but rare lichen. 



Lecanora privigna (Nyl.) var. pruinosa Auctt. On rocks. 

 Cole county. Mo., August, 1898. Coll., C. H. Demetrio. 



Rinodina oreina (Ach. ) Mass. On rocks. Socorro county, New 

 Mexico, March, 1895. Coll., C. J. Herrick. 



Pertusaria velata (Turn.) Nyl. On trees. La Crosse, Wis., 

 January, 1895. Coll., L. H. Pammel. 



