Pamphlets on Forestry, Volume 41991 |
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Page 470
... societies of the Huron basin is shown by the description of several local bogs , selected to show both the local bog flora and the variation in societies , and arranged to present the genetic changes in a bog flora as a basin filled by ...
... societies of the Huron basin is shown by the description of several local bogs , selected to show both the local bog flora and the variation in societies , and arranged to present the genetic changes in a bog flora as a basin filled by ...
Page 417
... societies in poorly drained situa- tions down to the present time seems to be due ( 1 ) to the lower temperatures prevailing there , ( 2 ) to the sterile nature of the sub- stratum , ( 3 ) to the completeness with which the substratum ...
... societies in poorly drained situa- tions down to the present time seems to be due ( 1 ) to the lower temperatures prevailing there , ( 2 ) to the sterile nature of the sub- stratum , ( 3 ) to the completeness with which the substratum ...
Page 417
when conifers are absent , they show no order of succession to the forest societies . This is to be explained on the basis of the migrations forced upon all boreal societies during glacial times . 6. The absence of conifers in the Ohio ...
when conifers are absent , they show no order of succession to the forest societies . This is to be explained on the basis of the migrations forced upon all boreal societies during glacial times . 6. The absence of conifers in the Ohio ...
Contents
The Huron River valley | 402 |
their development and ecological conditions | 360 |
The bogplant societies | 429 |
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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 piƱon 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