. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. FIBUO-VASCULAR BUNDLES. 103 tho exception of the parencln-ma, all these elements are elongated and are arranged in varions sorts of fascicles or bundles, whence the name, the fascictdar system. Since fibres and vessels pla)'. such an important part in tho composition of tliis sj-stem, it has been also called the flbro-vascular system, and the bundles, fibro- vascular bundles. 309. When reduced to its lowest terms, a fibro-vaseular bun- dle consists of two tissu
. Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology. Plant physiology; Plant anatomy. FIBUO-VASCULAR BUNDLES. 103 tho exception of the parencln-ma, all these elements are elongated and are arranged in varions sorts of fascicles or bundles, whence the name, the fascictdar system. Since fibres and vessels pla)'. such an important part in tho composition of tliis sj-stem, it has been also called the flbro-vascular system, and the bundles, fibro- vascular bundles. 309. When reduced to its lowest terms, a fibro-vaseular bun- dle consists of two tissue elements, namely-, cribrose-cells and tracheal cells, the latter being sometimes replaced either whollj' or in part b^- duets. 310. The two elements arc usuall}- associated with some parench^-ma and with a considerable proportion of long bast-. flbres ; but, while preserving a general uniforraitj- of structure throughout, a bundle ma}- become considerably changed in com- position during its course. This is well shown by comparing sections taken at some distance from each other; for instance, Fig. 83. Longitiidiiiiil radial section of a collateral libro-vasciilar bundle, from the stem of a dicotyledon : h—i, wood ; i—n, liber; the wood comprises, b, a narrow annular duct, c wider spiral duct, d, a duct with septum, e, woody parenchyma. /, woody fibre, j7, wide duct with areolatad pits. A, septate woody fibres; the liber comprises, n, liber- ilibres m, sliort parenchyma, /, cribrose-cells, i, cambium, k, long parenchyma or cam- biform. (Kny). 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 Goodale, George L. (George Lincoln), 1839-1923. New York [etc. ] : American Book Co.
Size: 1722px × 1451px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectplantanatomy, bookyea
