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for growing. On March 4, we visited the limestone hills and 
cliffs on the road toward Utuado; here high vertical cliffs support 
another Porto Rican palm, almost all of which is inaccessible, at 
least from below, but two active boys finally succeeded in reaching 
one for us, but it proved to be barren; an A gave grows sparingly 
on these cliffs and three young plants were obtained. Man 
kinds of ferns and mosses were collected in wet woods and on 
rocks, and the growth here of the small red-flowered Gesneria 
cunetfolia, endemic in Porto Rico, is noteworthy. March 5 was 
occupied in packing and care of collections, and in a visit to 
limestone hills of Manati, where the most abundant growth of 
e cycad Zamia integrifolia ever seen by us was observed. 
Reaching San Juan by railroad in the afternoon, we found that 
through the codperation of Mr. John R. Johnston, plant pathol- 
ogist of the Sugar Experiment Station at Rio Piedras, a trip had 
been organized to the Sierra de Naguabo, high mountains in the 
southeastern part of Porto Rico. On the following day, we 
went to Naguabo by motor car, where the party was ment 
entertained by Messrs. Alexander R. O’Neill and B. B. DeWit 
at the San Cristobal Sugar Mill, and by Mr. Harold J. cela 
at his residence; the kindness and codperation of these gentlemen 
is gratefully acknowledged. On March 7, we climbed about 7 
miles over foothills of the Sierra and made camp at 1,600 feet 
elevation in a deserted shack built mostly of the leaf sheaths of 
the mountain palm, Acrista monticola, and in our tent pitched 
alongside of it. Reinforced by Major Dutcher, Mr. Johnston 
and his assistant, Mr. Stevenson, Mr. T. H. Jones, entomologist 
of the Sugar Experiment Station, Dr. Shafer, who had come over 
from Vieques, and by Mr. Hess, who had meanwhile rejoined us, 
we had nine collectors assembled, and for three days the moun- 
tains were searched ae plants and invertebrate animals, Mrs. 
Britton remaining at the lower elevations most of the time for 
the care of the eae which were sent down by bearers at 
frequent intervals. The southern slopes, ravines, and summits 
of the Sierra yielded us specimens of over 200 species of plants, 
some of them of much interest, including many ferns and brome- 
liads taken for growing under glass, and herbarium material of 
