484 Eaton : Pteridophytes observed in Florida 



walking over them ; the tangle being so dense that it will support 

 the weight of a man. In favorable localities the fronds attain a 

 length of 3 to 3.6 meters. 



Nei'hrolepis exaltata Schott 



Mostly on palmettos but often on the ground in drier situations 

 than the last, much smaller in size. Very common in hammocks. 



SALVINIACEAE 



AZOLLA CAROLINIANA Willd. 



Collected only once, in a ditch at Sanford, and seen once from 

 a car window in east central Florida. Apparently absent from the 

 lower counties. 



LYCOPODIACEAE 



Lycopodium carolinianum L. 



In damp sand bordering a swamp at Fort Lauderdale, in com- 

 pany with L. adpressum ; resting in December. In a sandy 

 swamp at Sanford, with immature spikes June 1. In the autumn 

 the tips of the stems elongate and penetrate the earth to the depth 

 of 1 cm. or more, then thicken into scaly rootstocks 1 to 2 cm. 



long, from the end of which a shoot arises in spring to continue 

 the growth. 



Lycopodium cernuum L. 



Only one specimen seen from a car window on the damp 

 borders of a stream at Nocatee. 



Lycopodium adpressum (Chapm.) Underw. 



First found at Fort Lauderdale in November, in a ditch by the 

 railroad. I subsequently found a little at Orange Glade near 

 Miami, and another place along the river above Fort Lauderdale. 

 It was plentiful in a swampy field at Fort Myers, where it bore 

 abundant flabellate or decompound sterile peduncles in June. Ap- 

 parently confined to the borders of swamps in sandy regions. I 

 saw no L. alopeciiroides in South Florida. 



*v 



