n8 ROBERT SMITH [February 



been chosen. Already a large district has been surveyed, and in 1897 

 the first sheet was published. It is the region of the Eastern 

 Pyrenees, and shows clearly the areas in which the following trees 

 respectively dominate : — evergreen oak, cork oak, ordinary oak, chest- 

 nut, beech, maritime pine, Austrian pine, Scots pine, silver fir, and 

 mountain pine. 



BIBLIOGRAPHY. 



A. — General Works referred to in the Text, relating to the Growth and 

 Methods of the Study of Plant Associations. 



1806. Humboldt, Alex, von, " Ideen zu einer Physiognomik der Gewachse," Tubingen, 

 1806. See also his "Aspects of Nature " (trans, by Mrs. Sabine), vol. ii. 1849. 



1807. et Bonpland, " Essai sur la geographic des plantes," Paris. 



1820. De Candolle, A. P., " Projet d'une Flore physico-geographique de la vallee de 



Leman," Geneve. 

 1838. Grisebach, A., " Ueber d. Einfluss d. Klimas auf die Begrenzung d. naturlichen 



Floren," Linnacct, xii. pp. 159-200. 

 1849. Thurmann, J., " Essai de phytostatique appl. a la chaine du Jura, etc." Berne. 

 1855. De Candolle, Alph., "Geographie Botanique raisonnee," Paris et Geneve. 

 1863. Keener von Marilaun, A., "Das Pflanzenleben der Donaulander. 

 1869. Celakovsky, L., "Prodr. d. Flora Bohmens," (cited from Loew [1879]), 1869-74. 

 1872. Grisebach, A., "Die Vegetation der Erde," Leipzig. 



1874. De Candolle, Alph., " Constitution dans le regne vegetal de groupes physiolog- 

 iques applicables a la geographie botanique ancienne et modeme," Arch. Sei. phys. 

 nat., 1874. 



1875. Grisebach, A., " Pflanzengeographie " (in Neumayer, Anlcitung zu ivisscnsch. Beo- 

 bachtung auf Reiscn, 1. Aufl., pp. 333-358, Berlin). 



1879. Loew, " Ueber Perioden und Wege ehemaliger Pflanzenwanderungen ini norddeut- 



schen Tieflande," Linnaca, xlii. p. 592. 

 1879. Blomqvist, A. G., " Eine neue Methode den Holzwuchs und die Standortsvegeta- 



tion bildlich darzustellen," Bidrag till kdnnedom af Finlands natur och folk, etc., 



xxxi. pp. 145-153, Helsingibrs. 

 1879. Engler, A., " Versuch einer Entwicklungsgesch. d. Pflanzenwelt," Leipzig, 1879 



and 1882. 

 1881. Hult, R., " Forsok till en analytisk behandlung af vaxtformationerna," Medd. Soc. 



Faun. Flora fennica, viii. 

 1885. Reiter, H., " Die Consolidation der Physiognomik," Graz. 

 1887. Drude, O., "Atlas der Pflanzenverbreitung," Gotha. 



1887. Kerner von Marilaun, A., "Pflanzenleben," Lei23zig, 1S87 and 1891. English 

 edition, "Natural History of Plants," London, 1894 (see especially vol. ii. pp. 885- 

 899). 



1888. Drude, O., " Pflanzengeographie " (in Neumayer, Anlcitung zu wisscnsch. 

 Beobachtung auf Rcisen, 2. Aufl. Band. II.). 



1889. "Ueber d. Principien in der Unterscheidung von Vegetationsformationen," 



Bot. Jahrb. xi. 



1890. " Handbuch der Pflanzengeographie," Stuttgart (new edition in French, Paris, 



1897(. 



1892. Weber, C, "Ueber d. Zusammensetzung des naturlichen Graslandes in West- 

 holstein," etc., Sclir. nat. Vcr. Schlesvng-Holstcin, ix. pp. 179-217. 



1894. Schrceter, C. , "Associations de Plantes en A r alois," Bull. Soc. Bot. France, xli. 

 p. ccexxii. 



1895. Hock, F., " Genossenschaften in unserer Kiefernwaldflora," Nat. Wochcnschrift, 

 No. 19, p. 227, 12 Mai. 



1896. Warming, E., " Lehrbuch d. okologischen Pflanzengeographie," (German edition 

 by Knoblauch), Berlin. 



1897. Schneider, A., "The Phenomena of Symbiosis," 3Iinnesota Bot. Studies, Bull. 9, 

 No. xlix., pp. 923-948. 



1897a. Flahault, Ch., "Flore de la Vallee de Barcelonnette " (Soc. Bot. France, Session 

 extraordinaire Aoiit 1897, Notices publiees par le Comite local d'organisation, pp. 17- 

 58), Montpellier, 1897. 



1897b. "Essai d'une Carte Botanique et Forestiere de la France," Ann. Geogr. vi. 



pp. 289-312, pi. viii. 



1898. Pound, R., and Clements, F. E., "A Method of Determining the Abundance of 

 Secondary Species," Minnesota Bot. Studies, 2nd Ser. Part I. No. II. pp. 19-24. 



