PLANTS OF IOWA 109 



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

 On earth, and calcareous rocks, infrequent. 



VEREUCABIEI FAMILY. 



STAUROTHELE, Norm. 



1391. 8. 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, Ach. 

 Calcareous rocks. 



1396. V. pyrenophora, (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. 



