. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. THE CELL. 75 pit). These pits or channels may be simple or branched (Fig. 180), and in cross-section appear oval, round, etc.; or they may be elongated fissures. The woody tissue of the Pine family is characterized by bordered pits (Figs. 174^178), where each pit is surrounded, when viewed from without, with a ring (Figs. 173, bor, and 174) ; this result is brought about thus: a cir- cular portion of the w
. The elements of botany embracing organography, histology, vegetable physiology, systematic botany and economic botany ... together with a complete glossary of botanical terms. Botany. THE CELL. 75 pit). These pits or channels may be simple or branched (Fig. 180), and in cross-section appear oval, round, etc.; or they may be elongated fissures. The woody tissue of the Pine family is characterized by bordered pits (Figs. 174^178), where each pit is surrounded, when viewed from without, with a ring (Figs. 173, bor, and 174) ; this result is brought about thus: a cir- cular portion of the wall remains thin (Fig. 175), and around this a wall arises and grows inwards (Fig. 176), fââ {2\ 174 177 175 170 Fi^. 173. Diagrammatic section through diicts and cells, showing various modes of thickening; P, pith ; jry, wood; C, cambium ; Pk, bast; Or, cortex ; par, par- enchyma ; pros, prosenchyma; sie, sieve tubes; pit, pitted; bor, bordered pits ; scd, scalariform; ret, reticulated; an, annular; sp, spiral. Figs. 174-178. Bor- dered pits, and their 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 Kellerman, William Ashbrook, 1850-1908. Philadelphia, J. E. Potter and Company
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1883
