PLANTS OF IOWA 109 



1390. E. pusilhim, Hedw., var. garovaglii, Kph. 

 On earth, and calcareous rocks, infrequent. 



VERRUCARIEI FAMILY. 



Staurothele, Norm. 



1391. S. umbrina, (Wahl.) 

 Calcareous rocks. 



Verrucaria, (Pers.) Tuck. 



1392. V. nigrescens, Pers. 

 Calcareous rocks. 



1393. V. fuscella, Fr. 

 Calcareous rocks. 



1394. V. rupestris, Fr. 

 Calcareous rocks. 



1395. V. muralis, Aeh. 

 Calcareous rocks. 



1396. V. pyrenoplwra, (Ach.) Nyl. 

 Calcareous rocks. 



1397. V. epigcea, (Pers.) Ach. 

 On clay, rare. 



1398. V. viridula, Ach. Lich. 

 On granite, ^rare. 



Pyrenula, (Ach.) Naeg. & Hepp. 



1399. P. punctiformis, (Ach.) Naeg. 

 Trees. 



1400. P. gemata, (Ach.) Naeg. 

 Trees. 



1401. P. hyalospora, Nyl. 

 Trees. 



1402. P. leucoplaca, (Wallr.) Kbr. 

 Trees. 



1403. P. glabrata, (Ach.) Mass. 

 Trees. 



1404. P. nitida, Ach. 

 Trees. 



1405. P. thelena, Ach. 

 Trees. 



