4 l^REFAGE. 



A.uriculturo. Th;. t-i.sk has n?oii a lal)orious one, far more la))orious 

 than the printed results suooest, hut in th(> progress of the work its 

 necessity lias l)een amply demonstrated. The result is a substantial 

 l)asis for the uniform designation of economic tropical plants in accord- 

 ance witli the s3'stem now followed by American botanists. 



Mr. Satford is indebted to Dr. Barton W. Evcrmann, of the Bureau 

 of Fisheries, for photographs Nos. 1, 20, 22, and 44, taken by Dr. 

 Alfred G. IVIayer, of the Agassiz Expedition to the Tropical Pacific, 

 while attached to the U. S. Fish Connnission steamer Alhatross; to 

 j\Ir. "William Bengough for photographs Nos. 2, 7, 8, 23, and 60, taken 

 b}' him on the island of Guam in 11)00; to Lieut. Conmiander J. H 

 Craven, U. S. Nav}', for photograph No. 19; to Lieut. L. M. Nidton, 

 U. S. Navy, for photographs on plate 21; to Dr. Harvey Whittaker, 

 late of the U. S. Navy, for photograph No. 24; to Mr. B. J. Howard, 

 of the Bureau of Chemistry, U. S. Department of Agi-iculture, for 

 photographs on plates 9, 10 (fig. 1), 11, 12, and 13; to Mr, F. L. Lew- 

 ton, of the Bureau of Plant Industr}^, U. S. Department of Agricul- 

 ture, for photograph No. 35, taken in Johore for the Government 

 exhibit at Chicago; to Mr. Carl S. Scofield, of the U. S. Department 

 of Agriculture, for photographs Nos. 5, 50, and 57, taken from herba- 

 riimi specimens from the island of Guam; to Mr. C. B. Doj^le for 

 photographs Nos. 3, 4, 10 (fig. 2), 31, 32, 38, 40, 41, 42, 46, 47, 49, 51, 52, 

 53, 54, 56, 59, 61, 62, 64, 65, 68, from herbarium specimens, for No. 

 15 from the seed collection, and No. 14 from cultivated specimens, 

 taken under the supervision of the author, and No. 17 from specimens 

 collected in Guam by Lieut. Franck Taylor Evans, U. 8. Nav}^; to 

 Messrs. O. F. Cook and Guy N. Collins for Nos. 6, 25, 26, 29, 33, 34, 

 43, 44, 48, 55, 58, and 66, taken in Porto Rico, Nos. 27, 30, 36, 39, 

 taken in Guatemala, and Nos. 28 and 67, taken in Mexico; and to Mr. 

 Guy N. Collins for Nos. 16, 37, and 63, taken in the Hope Gardens, 

 Kingston, rJamaica. He is also indebted to Mr. Charles M. Mansfield 

 for photograph No. 69, taken from herbarium specimens sent to the 

 author from Guam b}^ Rev. flose Palomo. 



Through the courtesy of Professor Willis \j. Moore, Chief of the 

 Weather Bureau, an account of the climatology of Guam is also pre- 

 sented, the detailed study of which is the work of Dr. Cleveland 

 Abbe, jr. 



Fkederick V. COVII.LE, 

 Curator of the U. S. National llerharluia. 



