Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 68American Philosophical Society, 1929 |
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Сторінка 14
... plants . The description of the field observations that follow is a contribu- tion to that end . SUMMARY OF EUROPEAN INVESTIGATIONS Much of interest to the ecologist , who desires to investigate the scree plants , will be found in a ...
... plants . The description of the field observations that follow is a contribu- tion to that end . SUMMARY OF EUROPEAN INVESTIGATIONS Much of interest to the ecologist , who desires to investigate the scree plants , will be found in a ...
Сторінка 15
... plants are confined to the sub- nival and nival belts of the mountains . He enumerates the plants that are associated with the screes formed from primitive rocks ( urgestein ) and those that arise from cal- careous strata , and in ...
... plants are confined to the sub- nival and nival belts of the mountains . He enumerates the plants that are associated with the screes formed from primitive rocks ( urgestein ) and those that arise from cal- careous strata , and in ...
Сторінка 18
... plants in the formation of rock gardens and moraine gardens . There is abundant evidence that American plants succeed better than foreign plants under American conditions of plant environ- ment and the time is opportune with the ...
... plants in the formation of rock gardens and moraine gardens . There is abundant evidence that American plants succeed better than foreign plants under American conditions of plant environ- ment and the time is opportune with the ...
Зміст
Mans Future in the Light of His Past and Present By ALEŠ | 1 |
The Vegetation of the Screes or Talus Slopes of Western North | 13 |
Saxifraga Tolmiei Torr Gray a screecoverer | 20 |
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