Report upon the forestry investigations of the of agriculture1877-1898 . o two large, simple pits to each tracheid on the radial walls of the cells of the pith ray.—Group 1. Represented in this country by F. Three to sis simple pits to each tracheid on the walls of the cells of the pith ray.—Group 2. P. tccda,palustria,etc., including most of our hard and yellow II. Walls of tracheids of pith ray smooth, without dentate projections. a. One or two large pits to each tracheid on the radial walls of each cell of the pith ray.—Group 3. P. strobus lamhertiana
Report upon the forestry investigations of the of agriculture1877-1898 . o two large, simple pits to each tracheid on the radial walls of the cells of the pith ray.—Group 1. Represented in this country by F. Three to sis simple pits to each tracheid on the walls of the cells of the pith ray.—Group 2. P. tccda,palustria,etc., including most of our hard and yellow II. Walls of tracheids of pith ray smooth, without dentate projections. a. One or two large pits to each tracheid on the radial walls of each cell of the pith ray.—Group 3. P. strobus lamhertiana, and other true white pines. b. Three to six small pits on the radial walls of each cell of the pith ray.—Group 4. P. parryana, and other nut pines, including also P. balfouriana. The general features of structure of coniferous woods are represented in the accompanyingcut (flg. 20). The structural elements, as in all pine, are few and simple, and consist of (a.) tracheids, thecommon wood fibers, forming over 90 per cent of the volume; (&) medullary or pith rays, minute.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
