. The power of movement in plants . Plants; Botany. 274 MODIFIED CIBCUMNUTATION. Chap. V. Kg. 123. ^«-^^,5t. S'a/mJO'^i 6'40' fjtam. !f OamJ^ Sniiihia Pfiindii: hypouastic movement of thecurvedsummitof astern, whilst straightening itself, traced from 9 July 10th to 3 13th. Ape-t 9^ inches from the vertical glass. Diagram reduced to one-fifth of original scale. Plant illuminated through skylight; temp. 17J°-19° C. together. At the same time the loop became open and was thus reconverted into a hook, and this apparently was effected, by the geotropic movement of the apex
. The power of movement in plants . Plants; Botany. 274 MODIFIED CIBCUMNUTATION. Chap. V. Kg. 123. ^«-^^,5t. S'a/mJO'^i 6'40' fjtam. !f OamJ^ Sniiihia Pfiindii: hypouastic movement of thecurvedsummitof astern, whilst straightening itself, traced from 9 July 10th to 3 13th. Ape-t 9^ inches from the vertical glass. Diagram reduced to one-fifth of original scale. Plant illuminated through skylight; temp. 17J°-19° C. together. At the same time the loop became open and was thus reconverted into a hook, and this apparently was effected, by the geotropic movement of the apex in opposition to epinasty. In the case of Ampehpsis liede- racea, weight plays, as far as we could judge, a more im- portant part in the hooking of the tip. In order to ascertain whether the shoots of A. tri- cuspidata in straightening themselves under the com- bined action of hyponafity and apogeotropism moved in a simple straight course, or whether they circumnutated, glass filaments were fixed to the crowns of four hooked tips standing in their natural position; and the movements of the filaments were traced on a vertical glass. AU four tracings resembled each other in a general manner; hut we will give only one (see Fig. 122, p. 273). The filament rose at first, which shows that the hook was straighten- ing itself; it then zigzagged, moving a little to the left between and 9 Prom this latter hour on the 13th to on the fol- lowing morning (14th) the hook continued to straighten itself, and then zigzagged a short distance to the right. But from 1 to on the 14th the movement. 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 Darwin, Charles, 1809-1882; Darwin, Francis, Sir, 1848-1925. New York : D. Appleton
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
