Pamphlets on Forestry, Volume 41991 |
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Page 402
... favorable for western yellow pine , the piñon usually occupies the south and west aspects . Where conditions become less favorable , it occupies the north and east slopes , while the south and west slopes are bare or nearly so . This ...
... favorable for western yellow pine , the piñon usually occupies the south and west aspects . Where conditions become less favorable , it occupies the north and east slopes , while the south and west slopes are bare or nearly so . This ...
Page 413
favorable for a wide - spreading zone of boreal societies . In Pennsylvania the high relief of the Appalachians and consequent low temperature also afforded exceptional opportunities for the spread of these societies far to the south ...
favorable for a wide - spreading zone of boreal societies . In Pennsylvania the high relief of the Appalachians and consequent low temperature also afforded exceptional opportunities for the spread of these societies far to the south ...
Page 417
... favorable to the preservation of these types . 3. The " drained swamp " and " undrained swamp " classifi- cation will not hold over any great area . Undrained and drained depressions are both favorable to the development of the com- mon ...
... favorable to the preservation of these types . 3. The " drained swamp " and " undrained swamp " classifi- cation will not hold over any great area . Undrained and drained depressions are both favorable to the development of the com- mon ...
Contents
The Huron River valley | 402 |
their development and ecological conditions | 360 |
The bogplant societies | 429 |
4 other sections not shown
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2d whorl 4th whorl abundant acidity Alnus aments apex apical shoot Aronia average basin bast fibers Betula bog areas bog plants bog societies bog water branches cambial activity cambium cassandra conifers creosote crystals cutting depressions diameter increase Dicotyledonous drainage drained factors Fagales fiber bundles foliar ray forest formation genera glacial growth habitats HARTIG heartwood hickory Huron June lake larch Larix layers leaves lobes lower mature Michigan moraine occur parenchyma parenchyma cells peat perianth periderm phloem pine Pinus piñon Pinus rigida pith rays plant societies Platanus plates present Quercus radial region resin canals roots rows Salix sapwood scattered sclerenchyma sclerotic sedge shrubs sieve tubes soil species specimens sphagnum stem stone cells substratum surface swamp tamarack temperature thick tissue tracheids trees trunk twigs tyloses undrained uniseriate rays vegetation vessels Viola blanda walls white oak wood xerophilous xylem zone