108 
without saying. We also reached the mountains at Lares, and 
between that town and San Sebastian visited the home of the 
rarest and most beautiful of all Porto Rican palms, described 
by Mr. O. F. Cook some years ago from foliage alone, under the 
name Cocops rivalis. We were very fortunate in finding one 
large tree bearing clusters of immature fruit, and from this the 
relationship of this palm may now be determined. The Mesa 
mountain at Mayagtiez hoa specimens of several plants un- 
recorded as growing in Porto Ric 
Returning to San Juan April 10 we were able to visit the fruit 
region between Bayamon and Vega Baja on the 11th and to 
make a considerable collection on wooded limestone hills at 
epee completing the field work of the New York part of 
the expedition, which secured and brought to the Garden 3,152 
pone collections of plants, including over pee oe 
We sailed on the ‘‘ Caracas” from San Juan on Apri 
With additional field work and through the es of 
Professor Stevens, Mr. Johnston, and other insular botanists, 
it will be possible to prepare a descriptive flora of Porto Rico for 
publication within a few years. The botany of the small islands 
Mona and Desecheo, west of Porto Rico and of Cayo de Muertos 
off Ponce, is unknown, except for fine specimens of Mamillaria 
nivosa and Phyllanthus mii ele brought to me from M 
by Messrs. E. D. Noble and Marc Lejeune; no recent ie 
have been made on Vieques, but a few a from that island 
are preserved in European museums. In the mountain forests 
and coastal thickets, trees and dibs aieee exist which have 
not yet been identified botanically, while the lichens and fungi 
have scarcely yet been studied nor collected. The marine algae 
are pases known, and the fresh-water algae not at all. 
The botany of Porto Rico thus offers an inviting field for further 
investigation, 
ose and his assistants made a successful visit to Santo 
o and secured large collections « on the southern and 
chez. The region about Azua is extremely dry, the 
annual rainfall in recent years being only about 8 inches; the 
