April, 1923 ECOLOGICAL CLASSIFICATION OF PLANT COMMUNITIES 1 79 



Moss, C. E. 



'10 The Fundamental Units of Vegetation. New Phytol. 9: 18-53. 



Negri, G. 



'i4 Le unita ecologiche fondimentali in fitogeografia. Att. R. Acad. Sci. Torino 



49: 3-44- 

 Nichols, G. E. 



'17 The Interpretation and Application of Certain Terms and Concepts in the Eco- 

 logical Classification of Plant Communities. Plant World 20: 305-319, 341- 



353- 

 '18 The Vegetation of Northern Cape Breton Island, Nova Scotia. Trans. Conn. 

 Acad. Arts and Sci. 22: 240-467. /. 1-70. 

 Nordhagen, R. 



'19 Om nomenklatur og begrepsdannelse i plantesociologien. Nyt. Mag. f. Naturw. 

 57: 2-128. 

 Pavillard, J. 



'18 Les progres de la nomenclature dans la geographie botanique. Ann. Geog. 27: 



401-415. 



'19 Remarques sur la nomenclature phytogeographique. Montpellier. 



'20 Especes et associations. Montpellier. 



'22 Cinq ans de phytosociologie. Montpellier. 

 Pound, R., and Clements, F. E. 



'00 The phytogeography of Nebraska. Lincoln. 

 Raunkiaer, C. 



'05 Types biologiques pour la geographie botanique. Bull. Acad. Roy. Sci. et 

 Let. Denmark 1905: 347~437- /• i~4i- 



'07 Planterigets Livsformer og deres Betydning for Geografien. Copenhagen. 



'13 Formationsstatistiske Undersogelser paa Skagens Odde. Bot. Tids. 33: 197- 



243. pl 4-6- 

 '16 Om Valensmentoden. Bot. Tids. 34: 289-311. 

 Riibel, E. 



'12 Pflanzengeographische Monographic des Berninagebietes. Engler's Bot. Jahrb. 

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 Schimper, A. F. W. 



'03 Plant Geography upon a Physiological Basis, English edition. Oxford. 

 Tansley, A. G. 



'20 The Classification of Vegetation and the Concept of Development. Jour. Ecol. 

 8: 118-149. 

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'11 Types of British Vegetation. Cambridge. 

 Warming, E. 



'09 Oecology of Plants : an Introduction to the Study of Plant Communities. Ox- 

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 Warming, E., and Graebner, P. 



'18 Lehrbuch der okologischen Pflanzengeographie. Berlin. 

 Yapp, R. H. 



'22 The Concept of Habitat. Jour. Ecol. 10: 1-17. 



