 ... regions were then the most favorable for the growth and development of xeromorphic forms. Migration from northern centers of dispersal, the periods of climatic aridity, and the changes immediately before and after ice invasion, undoubtedly accentuated...  The American Journal of Science - Pagina 381911Volledige weergave - Over dit boek
 | 1909 - 394 pagina’s
...and after ice invasion, undoubtedly accentuated the ecological evolution of this type of vegetation. The extensive change in floral types which is particularly...retained under the most varied conditions, yet many other types arc profoundly and rapidly modified by changes in climate, physiography, and soil processes.... | |
 | 1912 - 664 pagina’s
...and after ice invasion, undoubtedly accentuated the ecological evolution of this type of vegetation. The extensive change in floral types which is particularly...often bear no apparent relation to the environment and arc retained under the most varied conditions, yet many other types are profoundly and rapidly modified... | |
 | Ohio. Division of Geological Survey - 1912 - 462 pagina’s
...and after ice invasion, undoubtedly accentuated the ecological evolution of this type of vegetation. The extensive change in floral types, which is particularly...protoplasmic forces. In some types the characteristics often bore no apparent relation to the environment, and were retained under the most varied conditions; yet... | |
 | Alfred Paul Dachnowski-Stokes, Geological Survey of Ohio - 1912 - 462 pagina’s
...and after ice invasion, undoubtedly accentuated the ecological evolution of this type of vegetation. The extensive change in floral types, which is particularly...protoplasmic forces. In some types the characteristics 'Bower, FO, The origin of a land flora. London, 1908. often bore no apparent relation to the environment,... | |
 | 1909 - 576 pagina’s
...and after ice invasion, undoubtedly accentuated the ecological evolution of this type of vegetation. The extensive change in floral types which is particularly...variability of protoplasmic forces. In some types the characteristies often bear no apparent relation to the environment and are retained under the most... | |
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