. The principles of botany, as exemplified in the phanerogamia. Botany; Botany; Phanerogams; 1854. NATURE AND SOURCES OF FOOD. Fig. 15. 101. Fig. 15. Vertical section through a young branch and petiole, showing the manner in which the vascular and cellular tissues of the leaf communicate with those of the stem, m pith of the stem; fv fibro-Tascular tissue next the pith passing into the petiole which is articulated to the axis ; pc,pc parenchyma of the stem; &, bud in the axil of the leaf; c, cushion or swelling below the leaf; /, forming fracture. ex-current layer situated on the upper sur
. The principles of botany, as exemplified in the phanerogamia. Botany; Botany; Phanerogams; 1854. NATURE AND SOURCES OF FOOD. Fig. 15. 101. Fig. 15. Vertical section through a young branch and petiole, showing the manner in which the vascular and cellular tissues of the leaf communicate with those of the stem, m pith of the stem; fv fibro-Tascular tissue next the pith passing into the petiole which is articulated to the axis ; pc,pc parenchyma of the stem; &, bud in the axil of the leaf; c, cushion or swelling below the leaf; /, forming fracture. ex-current layer situated on the upper surface of the petiole and lamina, and which is immediately connected with the alburnum of the stem, and a recurrent layer situated imme- diately beneath the first layer, on the under surface of the petiole and lamina, which is connected with the endophleum or inner fibrous bark. The sap is brought from the albur- num by the ex-current or upper-layer, into the leaf and distri- buted to all parts of its upper surface; having undergone all those chemical changes which render it suitable for vegetable assimilation, or having been elaborated into proper juice, then conveyed by the recurrent layer of fibres along the under surface of the lamina and petiole into the bark, down which it descends to the roots. That the sap re-descends from the leaves to the roots by 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 Coultas, Harland, d. 1877. Philadelphia : King & Baird
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectbotany, bookyear1854
