BOTANICAL LITERATURE. 159 
del Castillo’s Flore de la Polynésie frangaise; Doctor Guppy’s Solomon 
Islands and their Natives; Warburg, Beitriige 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 dU rville, 
already referred to, and the botany of the Cha//enger 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 Indié; 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 //era/d; Urban’s Sym- 
bolae Antillanae; Pittier’s Primitiae florae costaricensis; and the Flore 
phanérogamique des Antilles frangaises (Guadeloupe et Martinique), 
par le R. P. Duss (in Annales de VInstitut 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 Okologische 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. Engier 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 insettie 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; Dybowski’s Traité pratique de cultures tropicales; Sade- 
beck’s Kulturgewiichse der deutschen Kolonien und thre Erzeugnisse; 
Semler’s Tropische Agrikultur; Poulet’s Livre du Colon. Of these 
