BOTANICAL LITEEATURE. 159 



del Castillo's Flore de la Polynesie franchise; Doctor Guppy's Solomon 

 Islands and their Natives; Warburg, Beitrage zur Kenntniss der 

 papuanischen Flora (Engler's Jahrb., vol. 13, 1890). In addition to 

 these may be mentioned the publications of results of the scientific 

 expeditions of Malaspina, Romanzoff , Freycinet, and Dumont d'Urville, 

 already referred to, and the botaiw of the Challenger expedition. 



Other tropical floras. — Since many of the plants of Guam are 

 of wide distribution in the Tropics, it is interesting to compare its 

 flora with those of other tropical countries. The principal works 

 used for comparison have been Padre Blanco's Flora de Filipinas; 

 Hooker's Flora of British India; Trimen's Handbook of the Flora of 

 Ceylon; Miquel's Flora van Nederlandsch Indie; Grisebach's Flora of 

 the British West Indian Islands; Seemann's Flora of the Isthmus of 

 Panama, in the Botany of the Voyage of the Herald; Urban's Sym- 

 bolae Antillanae; Pittier's Primitiae florae costaricensis; and the Flore 

 phanerogam ique des Antilles francaises (Guadeloupe et Martinique), 

 par le R. P. Duss (in Annales de lTnstitut Colonial de Marseille). 

 Many of the botanical descriptions included in the Descriptive 

 catalogue of plants have been taken directly from Padre Blanco, 

 Hooker, and Trimen, and a few from Hillebrand, Grisebach, and 

 Seemann. 



Geographical distribution and ecology. — The following are the 

 more important works consulted: Grisebach's Geographische Ver- 

 breitung and Vegetation der Erde; Schimper's Pflanzen-Geographie 

 and Indomalayische Strandflora; Treub's Notice sur la nouvelle flore de 

 Krakatau; Haberlandt's Botanische Tropenreise; Darwin's Voyage of 

 the Beagle; Warming's Okologiscke Pflanzengeographie (German edi- 

 tion); De Candolle's Origin of Cultivated Plants; and Wallace's Island 

 Life. The attention of those interested in the dispersal of plants by 

 ocean currents is called to the works of Hemsley and Guppy, given in 

 the list below, and the works of Treub and Schimper, already cited. 



Systematic and physiological botany. — Engler and Prantl's 

 Natiirliche Pflanzenfamilien; Strasburger, Noll, Schenck, und Schim- 

 per's Lehrbuch der Botanik; Haberlandt's Pflanzenanatomie; Coulter's 

 plant structure ; Delpino's Rapporti tra insetti e tra nettarii estranuziali ; 

 and Darwin's Power of Movement in Plants and Effects of Cross and 

 Self Fertilization, are among the principal works consulted. 



tropical agriculture and economic products. 



Among the most important works on tropical agriculture consulted 

 are Firminger's Manual of Gardening for Bengal and Upper India; 

 Simmonds's Tropical Agriculture; Nicholls's Text-book of Tropical 

 Agriculture; D} T bowski's Traite pratique de cultures tropicales; Sade- 

 beck's Kulturgewachse der deutschen Kolonien und ihre Erzeugnisse; 

 Semler's Tropische Agrikultur; Poulet's Livre du Colon. Of those 



