Pamphlets on Forestry, Volume 41991 |
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Page 392
... observations were begun too late , sections from tree II on May 13 , 1910 , showed growth in such an advanced state that cambial activity must have begun fully as early the previous year . As regards cambial awakening in trees A , B ...
... observations were begun too late , sections from tree II on May 13 , 1910 , showed growth in such an advanced state that cambial activity must have begun fully as early the previous year . As regards cambial awakening in trees A , B ...
Page 398
... observations . As regards the theory advanced by FRIEDRICH concerning two periods of maximum growth in trees , little can be said . The second period if present in Pinus rigida must be the minor one , inasmuch as the ring was on an ...
... observations . As regards the theory advanced by FRIEDRICH concerning two periods of maximum growth in trees , little can be said . The second period if present in Pinus rigida must be the minor one , inasmuch as the ring was on an ...
Page 450
... observations for hardwoods are given in Table II . Stains were often employed to differentiate the tissues , and macerations were made with potassium hydroxide or chromic acid for special studies of the relations between the tylose and ...
... observations for hardwoods are given in Table II . Stains were often employed to differentiate the tissues , and macerations were made with potassium hydroxide or chromic acid for special studies of the relations between the tylose and ...
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