Pamphlets on Forestry, Volume 41991 |
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Page 265
... cells which are developed from single parenchyma cells . Pith rays . are usually not more than three rows wide , but become broader as they approach the middle bark . Their cells are more deli- cately walled than the bast parenchyma and ...
... cells which are developed from single parenchyma cells . Pith rays . are usually not more than three rows wide , but become broader as they approach the middle bark . Their cells are more deli- cately walled than the bast parenchyma and ...
Page 275
... cell in thickness , which cells by division produce a row of xylem mother and a row of phloem mother cells . Each of these rows divides and gives rise respectively to two rows of potential xylem cells and two rows of potential phloem cells ...
... cell in thickness , which cells by division produce a row of xylem mother and a row of phloem mother cells . Each of these rows divides and gives rise respectively to two rows of potential xylem cells and two rows of potential phloem cells ...
Page 448
... cells sunken beneath the slightly protuberant companion cells ; hypoderma of five- or six - cell layers on hadrome side , and eight layers on leptome side of midvein . Root : resinous bodies present in medullary rays and cortex , the ...
... cells sunken beneath the slightly protuberant companion cells ; hypoderma of five- or six - cell layers on hadrome side , and eight layers on leptome side of midvein . Root : resinous bodies present in medullary rays and cortex , the ...
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 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