. A manual of the North American gymnosperms [microform] : exclusive of the cycadales but together with certain exotic species. Bois; Trees; Gymnosperms; Gymnospermes; Arbres; Wood. BURUERtU FI'IS 63 taeda and P. cubeniis, as also Larix americana and ''suga cana- densis, afford illustrations that, while typically two-seriate, a given section may show a strictly one-seriate arrangement, and this difference also obtains as between contiguous cells. In all such cases examination will show that the variation is directly related to the relative size of the tracheids in such a way that the narrower
. A manual of the North American gymnosperms [microform] : exclusive of the cycadales but together with certain exotic species. Bois; Trees; Gymnosperms; Gymnospermes; Arbres; Wood. BURUERtU FI'IS 63 taeda and P. cubeniis, as also Larix americana and ''suga cana- densis, afford illustrations that, while typically two-seriate, a given section may show a strictly one-seriate arrangement, and this difference also obtains as between contiguous cells. In all such cases examination will show that the variation is directly related to the relative size of the tracheids in such a way that the narrower tracheids, or those arising from a less vigorous growth, are one-seriate. Within the individual trachcid thert; is. (SB ^ CD. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Penhallow, D. P. (David Pearce), 1854-1910. Boston : Ginn & Co.
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