THE PSILOTACE/E. 127 



The range of Psilotum triquetruui is from northern 

 Florida southward. The species was once reported 

 from South Carolina, but some doubt may be enter- 

 tained as to its existence there at present. In central 

 Florida it is not uncommon, usually growing on the 

 palmetto, and it is probable that it may yet be dis- 

 covered in other of the Gulf States near the coast. It is 

 widely spread in the tropics, extending quite around the 

 world and reaching Japan and New Zealand. It has 

 long been known under the specific name of triquetruui 

 in allusion to its three-angled branches, but recent works 

 occasionally list it as Psilotum nudum. Campbell, in 

 his " Mosses and Ferns," is inclined to add to the 

 Psilotaceae the genus Tuicsipteris, which contains a single 

 species growing in New Zealand. Other authors place 

 this with the Lycopodiaceae. No fossil plants have yet 

 been found that can with certainty be referred to the 

 Psilotaceae, though various specimens from the Coal 

 Measures are commonly regarded as belonging to this 

 family. 



