230 RoBINSON: PTERIDOPHYTA OF THE HAWAIIAN ISLANDS 
The United States Exploring Expedition under Captain Wilkes 
visited the Hawaiian Islands in 1840. Brackenridge, the botanist 
of the expedition, published his descriptions of ferns as a separate 
volume of the report of the expedition, but unfortunately the 
edition with the exception of about a dozen copies was destroyed 
by fire. A nearly complete set of his specimens is in the U.S. 
National Herbarium at Washington, D. C., and the collection is 
well represented at the New York Botanical Garden. 
Rev. J. Diell, seaman’s chaplain at Honolulu, aided Bracken- 
ridge materially in his collecting and also did much independently. 
On the Galathea Expedition, 1845-7, sent out from Denmark, 
Didrichsen was the botanist. The larger part of his collections 
are at Copenhagen; some specimens, however, have reached other 
herbaria by exchange. 
Between 1851 and 1855 Remy made collections for the Paris 
Museum, some of which may now be seen in the Gray Herbarium 
at Cambridge, Massachusetts. | 
In 1864 and 1865 Horace Mann with Dr. William T. Brigham, 
now Director of the Bernice Pauahi Bishop Museum at Honolulu, 
spent a year in botanizing over the five larger islands. With the 
aid of Professor Asa Gray, Mann made an enumeration of the 
plants found on the islands, which included one hundred and 
thirteen species of ferns. One set of these specimens is at the 
Museum in Honolulu and another at Cornell University, Ithaca, 
New York. Some of the numbers appear in other herbaria. 
Many residents in the islands have been interested in the fera 
flora and have made large collections. The Reverend John M. 
Lydgate, of Lihue, Kauai, civil engineer and botanist, as well a5 
clergyman, published an enumeration of Hawaiian ferns in 1873; 
when in college at Oberlin. His later collections have been con 
tributed to Dr. W. Hillebrand’s herbarium, now in Berlin. Many 
of the specimens from Kauai in the Berlin herbarium wert” : 
lected by Mr. Valdemar Knudsen. The late D. D- Baldwin, 
one time professor at Punahou College, has made large collec 
tions upon Oahu and Maui. Rev. Edward Bishop was an ardent : 
collector also. 
In 1883 Edward Bailey published ‘Hawaiian Ferns, 4 gers 
sis,” a small manual, now out of print. It contained descrip® 
of six new species. 
