88 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Mr. Upton also made a collection, which, however, arrived in such a condition as not to allow 

 of accurate discussion. Dr. Dixon's memorandum accompanying his collection, is as follows : 



"The vegetation of these coi-al islets is luxuriant, and in some tortious quite dense, yet 

 the variety of species does not cover a wide range. 



" The botanical specimens gathered comprise the entire flora of the islet occupied by the 

 United States Eclipse Expedition, excepting two varieties of portulaca, the cocoa-nut palm, 

 pine apple, papaw, and pandanns. Of the trees, there being several varieties, there were 

 procured leaves, old and young bark, and flower and fruit where possible. 



" The smaller plants yielded stems, root, and the flower, etc., when present. 



" Two varieties of grass were also obtained. 



"The pandanus, portulaca;, cocioa nut, fig, papaw, and pumpkin were recognized. 



"A large tree, forty or fifty feet in height, with a trunk four feet in diameter, is probably the 

 Pisonia grandis. 



"The wood of a small tree. No. 7 (in collection), is capable of a high polish. Some of the 

 specimens may deteriorate and become unrecognizable, but the limited means for preservation at 

 hand were fully made use of. Large roots and fruit are preserved in a box, numbers corresponding 

 to appropriate specimens between bibulous papers, being; affixed." . 



The report of Professor Trelbase is given below : 



University of Wisconsin, Botanical Laboratory, 



Madison, Wisconsin, September 18, 1883. 

 Dear Sir : I have the honor to present to you the accompanying report on the flora of 

 Caroline Island, based upon the collection made under your direction by Dr. DixON, U. S. N., and 

 submitted to me for examination. Very respectfully, 



WILLIAM TRELEASE, 



Prof. E. S. HOLDEN. 



REPORT ON THE COLLECTION OF PLANTS MADE BY DR. DIXON, U. S. N. 



(By William Trelease.) 



The following list comprises the entire flora of Caroline Island, wild and cultivated, exclusive 

 of Algae, of which but one specimen was preserved by Dr. Dixon. In one or two cases no speci- 

 mens were collected. The identification of these species (inclosed in the list in parentheses) rests 

 upon the collector. In naming the collection I have been much indebted to Dr. AsA Gray, whose 

 profound knowledge of the South Sea flora has rendered possible the identification of several 

 species which were represented by very imperfect specimens. 



The species not included in the botany of the Wilkes exploring expedition are marked with 

 an asterisk in the list. With the single exception of Fleurya Tuderalis, which was collected on 

 the island adjacent to that occupied by the Eclipse party, the plants are from the island occupied 

 by the party. 



Beside the species enumerated, one lily, or amaryllis (" No. 4"), was collected, of which the 

 collector says: " Flower, 4 inches long, white, with brown lines, etc. Specimen destroyed, nearly. 

 Stalks 18 inches high, bright green." The material is insufficient for identification. 



Crucifer^. 



Lepidium piscidium, Forst., Prodr., 249. 

 " Pepper-grass, No. 9." 



