. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. Fig. 216.—Cells: A, Elder pith {Sitmhaem nigra). B, young cells of Beet (.Bela vulgaris): n, n, n, nuclei. • C, Beau {t'haseulus vutgaris). D, Water Crowfoot {Kanun- cuius aqiiatilis), which gives us the most important staple of commerce, consists of long, tubular hairs, each hair a single cell, which becomes flattened and twisted as it ripens, and thus adapted for spinning. 364. Cell-sizes vary also. The usual size is ^^^ to jj^ of an inch in diameter. The Elder cell is ^
. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. Fig. 216.—Cells: A, Elder pith {Sitmhaem nigra). B, young cells of Beet (.Bela vulgaris): n, n, n, nuclei. • C, Beau {t'haseulus vutgaris). D, Water Crowfoot {Kanun- cuius aqiiatilis), which gives us the most important staple of commerce, consists of long, tubular hairs, each hair a single cell, which becomes flattened and twisted as it ripens, and thus adapted for spinning. 364. Cell-sizes vary also. The usual size is ^^^ to jj^ of an inch in diameter. The Elder cell is ^^^ of an inch; that of the Cork only yj'o^y of an inch. 365. Cell-markings.—The young cell at first has a wall of even thickness. As it grows, it deposits an inner layer, which, however, is interrupted, leaving thin places, called dots; through these the fluids pass from cell to cell; the dot in one cell being complementary to the dot in the cell adjoining. Difiisrent deposits give different markings ; so that we have Dotted, or Punctate, .^',^^_ cells in the Elder (Fig. 217, A); Rayed and Reticu- late cells in the Mistletoe (B); Annular cells in the. 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 Ketchum, Annie Chambers, 1824-1904. Philadelphia, J. B. Lippincott company
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