PLANTS OF IOWA 115 



ORTHOTRICHE.2E TEIBE. 



ORTHOTRICHUM, Hedw. 



1449. 0. port en f Aust. 



Not rare; on dry rocks in the spring, associated with 

 the preceding. 



1450. 0. brachytrichum, Schimp. 



Common on the bark of trees ; fruiting in early spring. 



1451. 0. braunii, Bruch. & Schimp. 

 Rare ; growing on trees. 



PHYSCOMITRIE^ TRIBE. 



PYRAMIDULA. 



1452. P. tetragona, Brid. 



A very rare species with a limited distribution in the 

 United States; collected only on ledges on quartzite. 

 PHYSCOMITRIUM, Brid. 



1453. P. acuminatum, Bruch. & Schimp. 



Not rare in southeastern Iowa ; growing on low ground, 



exposed to the sunshine. 

 .FUNARIA, Schreb. 



1454. F. hygrometrica, Sibth. 



Common throughout the state; growing on the ground 

 in woods and open places. 



BARTRAMIE^I TRIBE. 



BARTRAMIA, Hedw. 



1455. B. pomiformis, Hedw. 



Very common on shaded bluffs bordering streams. 



BRYE^I TRIBE. 



LEPTOBRYUM. 



1456. L. pyriformis, Schimp. 



Not rare; a very delicate form growing on the ground 



or damp rocks. 

 BRYUM, Br. & Sch. 



1457. B. intermedium, Brid. 



Very common everywhere, growing on rocks or on the 

 ground. 



