. The power of movement in plants. Plants; Botany. S°;. Oerms spedocbsiinus: circumnutation of stem, illuminated from above, tracca on a horizontal glass, in A from 9 to on Nov. 2,'ird; and in B from on the 24th to 8 on the 25th. Movement of the bead in B magnified about 38 times. (11.) Hed';ra lelix (Araliaceae, Fam. 114).—The stem is known to be apheliotropic, and several seedlings growing in a pot in the greenhouse became bent in the middle of the summer at right angles f i om the light. On Sept. 2nd some of these stems were tied up so as to stand ve
. The power of movement in plants. Plants; Botany. S°;. Oerms spedocbsiinus: circumnutation of stem, illuminated from above, tracca on a horizontal glass, in A from 9 to on Nov. 2,'ird; and in B from on the 24th to 8 on the 25th. Movement of the bead in B magnified about 38 times. (11.) Hed';ra lelix (Araliaceae, Fam. 114).—The stem is known to be apheliotropic, and several seedlings growing in a pot in the greenhouse became bent in the middle of the summer at right angles f i om the light. On Sept. 2nd some of these stems were tied up so as to stand vertically, and were placed before a north-east window; but to our surprise they were now decidedly heliotropic, for during 4 days they curved them- selves towards the light, and their course being traced on a horizontal glass, was strongly zigzag. During the 6 succeed- ing days they circumnutated over the same small space at a slow rate, but there could be no doubt about their circumnuta- tion. The plants were kept exactly in the same place before the window, and after an interval of 15 days the stems were again observed during 2 days and their movements traced, and. 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, Appleton
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
