Treesearch

The trees of Puerto Rico and the Virgin Islands, both United States and British, are described and illustrated in two volumes, of which this is the second (volume 2). "Common Trees of Puerto Rico and the Virgin Islands" by Little and Wadsworth (52, 53), the first, is cited here as volume l. The first volume contains on facing pages the descriptions and drawings of 250 common tree species, both native and introduced. This second volume similarly treats 460 additional species and briefly describes 40 others, a total of 500. Thus, the two volumes together contain the text of 750 species and...

Most of the neotropical nations except Mexico and Brazil are mapped according to the Moldridge system of ecological life zones. In order to have comparability with these areas, Puerto Rico and the U.S. Virgin Islands were mapped and a discussion and a description of each life zone were written. The manuscript in English offers water balances, a description of the Holdridge theory of biotemperature, and greater detail in general. The shortened version in Spanish is intended as a field manual to be used with the map. Six life zones are present on these islands and are present also in South...

Forestry has been less studied in tropical than in temperate climate. In the tropics information is needed in many phases of forestry work. In Puerto Rico, reforestation had not been carried on an isalnd-wide scale until the Civilian Conservation Corps and the Puerto Rico Reconstruction Administration initiated a forestry program in Federal and Insular forests during 1934 and 1935.Pratically no research and little plantation establishment had een done previously. Formal research was not organized until 1939.