APPENDIX I. 



TREES OF PORTO RICO. 



ByW. D. Brush, Scientific Assistant, and Louis S. Murphy, Forest Examiner, Forest 

 Service; and CD. Mell, formerly Assistant Dendrologist, Forest Service. 



INTRODUCTORY NOTE. 



Much has been published concerning the flora of Porto Rico, yet little of it is avail- 

 able for general use, particularly concerning the trees. Hill in his bulletin on the For- 

 ests of Porto Rico (Bui. 25, Forest Service) listed some 60 different kinds of trees, and 

 the woods of 15 of these were described by Sud worth. The work of Gifford and Bar- 

 rett (Bui. 54, Forest Service, "The Luquillo Forest Reserve, Porto Rico") has already 

 been referred to. 



As to arrangement and nomenclature particularly, the principal reliance in preparing 

 this present compilation has been Ignatius Urban's Symbolee Antillanae Seu Funda- 

 menta Florse Indies Occidentalis. Scientific equivalents have been given only in 

 cases where they appear to be in well-established popular usage, as, for example, Roy- 

 stonia borinquena for Oreodoxa caribaea. 



Acknowledgment is also due to the authors of the above-mentioned Forest Service 

 bulletins, Cook and Collins (Economic Plants of Porto Rico), W. Harris (The Timbers 

 of Jamaica), John T. Rae (West Indian Timbers), and numerous other authorities for 

 descriptive data concerning the uses of the wood and other products of the trees listed. 

 Special acknowledgment is due to Miss J. S. Peyton for painstaking work in the prepa- 

 ration of the index and comparing the spelling of both common and scientific names 

 in the final copy of the manuscript with the original authorities. 



The microscopic descriptions of wood structure of the species marked with an 

 asterisk, thus (*8. Chlorophora tinctoria) are based on examination by Messrs. Mell and 

 Brush of wood samples in the Forest Service wood collection. 



It has been the intention of the authors to include all erect woody plants which 

 attain a height of 15 feet or over, including the tree cactuses and opuntias. The 

 heights and diameters, it should be remembered, represent the extreme sizes which 

 the species have been reported to attain, and are thus often considerably larger than 

 those commonly met with. For convenience in reading, the technical wood 

 descriptions, the less important species, and all but the most common exotic spe- 

 cies have been subordinated to the general text. Little-known species and species 

 and genera of very minor importance have been combined where possible and sub- 

 ordinated into notes, yet for completeness have been included. 



Following is a synopsis showing the families represented, 57 in all, and the number 

 of genera and species in each family. The genera total 172 and the species 292: 



Family. 



Genera. 



Species. 



Family. 



Genera. 



Species. 



Family. 



Genera. 



Species. 



Palmae 



4 



5 



Malpighiaceae.... 

 Euphorbiaceae.. . 



1 



2 



Thymelaeaceae . . 



1 



2 



Juglandaceae 



1 





9 



11 



Rhizophoraceae.. 



2 



2 



Ulmaceae 



1 



1 



Anacardiaceae. . . 



4 



5 



Combretaceae 



5 



5 



Moraceae 



6 



9 



Aquifoliaceae 



Celastraceae 



1 



2 



Myrtaceae 



5 



13 



Polygonaceae — 



1 



8 



1 



1 



Melastomataceae. 



4 



10 



Nyctaginacese. . . 



1 



1 



Staphyleaceae.. . . 

 Sapindaceae..... 

 Sabiaceae 



1 



1 



Araliaceae 



2 



3 



Magnoliaceae 



1 



2 



5 



6 



Myrsinaceae 



1 



2 



Anonaceae 



4 



9 



1 



2 



Sapotaceae 



7 



17 



Lauraceae 



6 



17 



Rhamnaceae 



1 - 



2 



Ebenaceae 



2 



2 



Hernandaceae.... 



1 



1 



Elaeocarpaceae... 



1 



1 



Symplocaceae 



1 



5 



Cappardiaeeae . . . 



1 



2 



Malvaceae 



2 



3 



Styracaceae 



1 



1 





1 



1 





4 



4 





1 



1 



Rosaceae 



2 



22 



3 

 30 



Sterculiaceae 



Ternstrcemiaceae 



3 



2 

 5 



Apocynaceae 



Barraginaceae 



2 

 1 



2 



Leguminoseae . . . 



6 



Zygophyllaceae.. 



1 



2 



Guttiferae 



4 



5 



Verbenaceae 



5 



6 



Rutaceae 



4 



14 



Bixaceae 



1 



1 



Bignoniaceee 



3 



6 



Simarubaceae 



2 



2 



Winteraceae 



2 



2 



Rubiaceae 



11 



16 



Burseraceae 



3 



3 



Flacourtiacese. . . 



3 



8 



Caprifoliaceae — 



1 



1 



Meliaceae 



5 



9 



Cactaceae 



4 



8 



Graminese 



1 



1 



56 



