186 IOWA ACADEMY OF SCIENCES. 



perfectly with the description, having spores 4 inasci, 4 celled, 

 brownish and 16-19 x 5-6 mic. 



Calicium parietinum Ach.. On decorticated wood, especially 

 red cedar, probably frequent. Fayette. 



Calicium quercinum Pers. On oaks, rare. Fayette. 



Sphinctrina tigillaris B. and Br. On Polyporus versicolor L 

 Fr., rare. Fayette. Placed here because of close relation- 

 ship to the last two, though the algal cells probably are want- 

 ing in this. Perhaps better to place it in the above genus 

 under the synonym, Calicium polyporceum Nyl. 



Verrucaria epigoea Pers., Ach. On clay, rare. Fayette. 



Pyrenula cinerella Fit., Willey. On prickly ash, frequent. 

 Fayette. 



Thelocarpon prasinellum Nyl. Old boards, frequent. Fay- 

 ette and Bremer counties. 



NOTES CONCERNING SOME SPECIES PREVIOUSLY REPORTED 



FOR IOWA. 



Evernia prunasuri L., Ach. I have recently found this 

 species on old board fences at Fayette. Thus far it has not 

 occurred elsewhere in the state, though it is very common in 

 northern Minnesota and frequent as far south as Minneapolis. 

 Its southern limit is doubtless reached somewhere in Iowa. 



Pt/cine sorediata Fr. This lichen was only listed in the paper 

 on " Lichens of Iowa " from rocks. It has since been found in 

 fruit on trees at Fayette. It becomes more common in passing 

 north to the British possessions, and its distribution in other 

 parts of Iowa is especially worthy of study. 



Sticta pulmonaria'L., Ach. Only known thus far in Iowa 

 along the Mississippi river in Clayton county. How far this 

 northern lichen extends south along the river, or possibly in 

 other parts of Iowa, is of special interest. Like the last two, 

 I find it increasing in abundance as I go north. 



Pannaris languinosa (Ach.,) Koerb. I have recently collected 

 the sulphur colored form, common in Europe, on the Saint 

 Peter sandstone in Clayton county and in several localities in 

 Minnesota. 



Lecanora punicea Ach. Any further occurrence of this in 

 Iowa should be noted, because it is a southern lichen, and it 

 finds its most northern known limit in Iowa. 



