. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. SAP maple and other trees in the early sprinfr, before the soil has thawed and while it is yet to \>l fertile living matter of the plant to show any irn at artivity, is not due to the bleeding pressure, hut to ilir exi.^nsion of the gases and liquids in the trunk ai
. Cyclopedia of American horticulture : comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening; Horticulture; Horticulture; Horticulture. SAP maple and other trees in the early sprinfr, before the soil has thawed and while it is yet to \>l fertile living matter of the plant to show any irn at artivity, is not due to the bleeding pressure, hut to ilir exi.^nsion of the gases and liquids in the trunk of the tree due to the direct warming lution ut' thu ^un'.s rays. During the daytime the bubbles of air in the wood cells become heated and expand, driving the sap from the wood cells into the auger hole which has been bored into the tree. At night the trunk of the tree cools slowly and the flow ceases, to be begun again next day. The amount of bleeding exhibited by any plant may be found if the stem is cut and bent over in such man- ner that the end is thi-ust into a tumbler or small ves- sel, which will serve to collect the escaping sap. The ordinary upward movement of sap takes place through the most recently formed wood cells at a rate that varies from a few Inches to a yard an hour. The force which lifts the sap is ultimately derived from the sun. The cells in the leaf contain many substances which attract water, and the sun shines on these cells, evaporating some of the fluid; the loss is replaced from the nearest cells below by osmotic attraction and the pull thus exerted may serve to draw water from the roots to the leaves even in the tallest trees, although it is to be said that not all of the question of the ascent of sap may be satisfactorily explained by the facts at hand. See Physiologij of Plaxts. D. T. MacDocgal. SAPlNDUS (Latin words meaning soap and Indian; alluding to the use of the fruit in India). Sapind&cece. Soapberry. A genus of about 12
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Keywords: ., bookcentury1900, bookdecade1900, booksubjec, booksubjectgardening
