31 
Trees of this nature were frequently noted in the vicinity of 
Jacksonville and Daytona and in the Biscayne Bay region. 
After leaving the palmetto formation, an extended stretch of 
alternating pineland and scrub is encountered, the timber in the 
former being composed almost entirely of Pinus oe while 
in the scrub.the only and characteristic tree is P. clausa; Ci 
ttola ertcoides, shrub peculiar to this latter formation, was com- 
monly observed. 
Upon arrival at Miami, headquarters were established at the 
Tropical Laboratory of the United States Department of Agri- 
culture, on the kind invitation of Professor P. H. Rolfs, who is 
in charge there. He placed. at our disposal every convenience 
and facility in his power, and we were thus enabled to accomplish 
much more than had been anticipated. We wish to express our 
hearty appreciation of the kindness and courtesy of Professor 
Rolfs, and also of his assistant, Mr. Hendrickson. 
The rainy season was about over when we reached our field of 
operations. With this condition in our favor, by careful plan- 
ning for all the time at our disposal, and by husbanding our funds, 
we were able to make a collection of considerable size. Ship- 
ments were made every second or third day, and we are pleased 
to report the safe arrival of all these. Sixteen days were spent 
in collecting in the Biscayne Bay region; of these, two days 
were allotted to the Keys, and one day and a part of another to 
the Everglades, or Glades, as they are locally called, the re- 
mainder being devoted to the partial exploration of the vicinities 
of Miami and Cocoanut Grove, and to the country south of the 
latter place. This region is entirely of coral formation and con- 
sequently honey-combed limestone rock is everywhere. This 
in some areas, principally along the water-courses and in the 
hammocks, has a thin covering of soil, composed of white sand 
and leaf-mold. For the most part, however, the coral rock comes 
right to the surface, and what little soil occurs is found only in 
the cavities. Strange as it may seem, this apparently almost im- 
penetrable rocky condition supports a very luxuriant vegetation, 
not only of native growth, but also of cultivated plants. It was 
soon made evident that digging plants under such conditions was 
