6 AMERICAN FERN JOURNAL 
of the ferns found are new species, and many belong 
to genera that need critical study and revision, such 
as Selaginella, Pteris, Tectaria, Polystichum, and Adian- 
tum. It is impossible, therefore, to publish at this 
time a list of the three or four hundred different species 
collected. A brief account of the various regions visited 
may, nevertheless, be of interest. 
With the city of Ancon, at the Pacific terminal of 
the Canal, as a center during seven months of my stay 
on the Isthmus, the territory explored falls naturally 
under five general headings: Juan Diaz, the Chagres 
River, Frijoles, the Pacific end of the Zone, and the 
Island of Taboga. The first three regions are char- 
acterized by a dense wet jungle, where, mostly along 
the banks of streams, an extensive and varied fern 
flora is to be found; the last two by dry hillsides and 
Open woods, where.ferns are scarce. One month was 
spent among the high mountains of western Panama, 
where a totally different and extremely luxuriant flora 
exists. 
JUAN Diaz 
The small native village of Juan Diaz is situated 
upon a river of the same name, some ten miles east of 
the city of Panama. About a mile beyond this village 
the dense tropical jungle begins, and some fourteen 
miles further lies the Pacora River, the limit of the 
region explored. The jungle is broken at frequent 
intervals by open prairies, or sabanas. A road runs 
from Panama to Pacora, but only in the months of 
February and March—the dry season—is it passable 
its entire length. During the remainder of the year 
one cannot safely go in an automobile farther than the 
Tapia River, about four miles beyond Juan Diaz. It 
is in this region between the Juan Diaz and Tapia 
Rivers, extending north about five miles and south 
