FERN GROTTOES OF FLORIDA 77 
journal. (Her quoted definition of hammock on page 
43 is spoiled by the accidental omission of nearly a Pa 
The original of the quotation is in a footnote on 
217 of the third annual report of the Florida Goulieeal 
Survey.) 
The following is an annotated list of the ferns of this 
locality, with the names brought as nearly as possible 
up to date. The identity of some of them has long been 
in doubt, and the names of most of them have been 
changed in recent years (perhaps because fern taxono- 
mists having comparatively few species to work with 
must keep revising them in order to keep busy), which 
seems unfortunate to an “outsider” who is not specially 
interested in ferns. I am indebted to Miss Margaret 
Slosson for assistance in straightening out some of the 
names. 
PoLypopium PLUMULA HBK. 
Mostly on bases of trees, not abundant. Fern stu- 
dents have long had trouble in distinguishing this from 
P. pectinatum L. Both species are reported from sev- 
eral other places in peninsular Florida and tropical 
America. 
Potypopium poLtypopiorpEs (L.) A. 8. Hitchcock. 
On trees. Widely distributed in the southeastern 
United States and tropical America. 
PTERIS CRETICA L.? 
On rocks. There has been much confusion between 
this and P. multifida Poir. (P. serrulata of many authors; 
see Underwood, Torreya 7: 196. Oct. 1907) and both 
have been suspected of being mere escapes from culti- 
vation.!. But it is inconceivable that an exotic plant 
could have become established at this locality at a time 
when there were no railroads or settlements near. It 
1 See Fern Bull. 13: 9. 1905. 
