266 HARPER 



Tillandsia usneoides L., Sp. PI. ed. 2. 411. 1762. 



On various trees, mostly in hammocks and river-swamps. It 

 seems to have a decided preference for trees growing in 

 calcareous soil, and is therefore not as common in our terri- 

 tory as in the lime-sink region and along the coast. Ranges 

 throughout South Georgia, but I have never seen it in 

 Middle Georgia except once near the Chattahoochee River 

 a mile or two above the fall-line in Muscogee County. Its 

 range is similarly restricted in Alabama, according to Mohr 

 and Earle, but just why this should be the case is a mystery. 



Virginia to South Florida and Texas, in the coastal plain. 

 Also in tropical America. 



For an anatomical study see F. H. Billings, Bot. Gaz. 38: 

 99—120. /. 1. pi. 8— 11. 1904. 



PONTEDERIACE^. 

 PONTEDERIA L., Sp. PI. 288. 1753. 

 P. cordata L., 1. c. 



A typical inhabitant of cypress ponds, more rarely in other 

 ponds, and in streams. Quite common throughout the 

 pine-barrens of Georgia and in brackish marshes along the 

 coast. Not seen farther inland than the outlying area of 

 pine-barrens near Omaha (see Bull. Torrey Club 32 : 457. /. 



3- t-9°S-) 



In our territory it nearly always has narrow leaf -blades, 

 quite different from the robust broad-leaved forms in the 

 brackish marshes, but all gradations between them can be 

 found. Fl. April-Aug. 

 Nearly throughout the glaciated region and coastal plain of 

 temperate Eastern North America (see Rhodora 7:73. 1905). 

 Also reported from Central and South America, which de- 

 serves closer investigation. 



COMMELINACE^. 



TRADESCANTIA L., Sp. PI. 288. 1753. 

 T. reflexa Raf.,New Fl. N. A. 2 187. 1836; Small, Bull. Torrey 

 Club 24 : 232. 1897. 

 Sand-hills; rare, bulloch, coffee. Fl. June. 

 Range not fully worked out. 



