Pamphlets on Forestry, Volume 41991 |
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Page 371
... substratum . When to this is added the twigs and small branches which fall each season , we can understand the fact that the substratum is almost entirely free of surface water . Usually the ground - water level lies 5-10 cm below . But ...
... substratum . When to this is added the twigs and small branches which fall each season , we can understand the fact that the substratum is almost entirely free of surface water . Usually the ground - water level lies 5-10 cm below . But ...
Page 376
... substratum as on the ordinary swamp soils , and that the swamp species of this vicinity may all be found at one place or another grow- ing on bog soils . It would seem that here the bog substratum is no more efficient as a selective ...
... substratum as on the ordinary swamp soils , and that the swamp species of this vicinity may all be found at one place or another grow- ing on bog soils . It would seem that here the bog substratum is no more efficient as a selective ...
Page 390
... substratum has been built by fore- runners of the present vegetation . Owing to the influence of the wind in the production of waves , the bogs are largely wanting on the eastern shores of lakes , and in the case of basins which have ...
... substratum has been built by fore- runners of the present vegetation . Owing to the influence of the wind in the production of waves , the bogs are largely wanting on the eastern shores of lakes , and in the case of basins which have ...
Contents
The Huron River valley 351 | 351 |
their development and ecological conditions | 360 |
The bog plant societies | 429 |
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2d whorl 4th whorl abundant acidity aggregate ray Alnus aments annual ring apex Aronia basin bast fibers Betula bog areas bog plants bog societies bog water branches cambial activity cambium cassandra conifers creosote crystals cutting depressions diameter increase Dicotyledons drainage drained factors Fagales fiber bundles foliar ray forest formation glacial growth habitats HARTIG heartwood hickory Huron June lake larch Larix layers leaves lower 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 tyloses undrained uniseriate rays vegetation vessels Viola blanda walls white oak wood xerophilous xylem zone μ μ μ