314 HARPER 



in Sumter, Clinch, and Lowndes Counties, in other parts 

 of the coastal plain. 

 Eastern United States 



ISOPTERYGIUM Mitt. 



I. micans (Sw.) E. G. Britton, Bryologist 5 : 67. 1902. 



On damp decaying logs, in shade, coffee {i44pa; also with 



2046c). Also in Sumter and Randolph Counties, in the 



upper third of the coastal plain. 

 New Jersey to Florida and Louisiana. 



RHYNCHOSTEGIUM. 



R. serrulatum (Hedw.) Jaeg. & Sauerb. 



Habitat similar to that of the preceding. . Bulloch {884c, 



in part). Also in Randolph County. 

 Eastern North America. 



THUIDIUM Br. & Sch. 

 T. sp. 



berrien: On roots of trees in non-alluvial swamp of Little 

 River west of Tifton {1700a). 



LEUCODON Schwaegr. Suppl. 2:1. 1816. 



L. julaceus minor 



coffee: On bark of Acer rubrum, on bank of Seventeen Mile 

 Creek {1434a). 



HEDWIGIA Ehrh., Hann. Mag. 1781. 



H. albicans viridis (Schimp.) 



tattnall: On cliffs of Altamaha Grit near Pendleton Creek 

 {1860b). This genus is rare in the coastal plain, on 

 account of the scarcity of dry non-calcareous rocks which it 

 prefers. 



THELIA Sull. 

 T. asprella (Schimp.) Sull. 



tattnall: On ledge of Altamaha Grit near Ohoopee River 

 • {1857a) ; coffee: On the ground in hammocks and sand- 

 hammocks {1434a 1 ). 

 Eastern North America. 



