. The power of movement in plants. Plants; Botany. 381 MODIFIED CIRCUMNUTATION. Chap. VII. leaf had risen greatly, and continued to rise till , aftei which hour it redescended. It should be observed that the lines traced on this second morning would have coincided with and confused those previously traced, had not the pot been slided a very Httle to the left. In the evening (Mth) a mark was placed behind the iilament attached to the apex of the leaf, and its movement was carefully traced from 5 to Fig. Passiflora gracilis; circumnutatioD and nyctitropic movement
. The power of movement in plants. Plants; Botany. 381 MODIFIED CIRCUMNUTATION. Chap. VII. leaf had risen greatly, and continued to rise till , aftei which hour it redescended. It should be observed that the lines traced on this second morning would have coincided with and confused those previously traced, had not the pot been slided a very Httle to the left. In the evening (Mth) a mark was placed behind the iilament attached to the apex of the leaf, and its movement was carefully traced from 5 to Fig. Passiflora gracilis; circumnutatioD and nyctitropic movement of leaf traced on vertical glass, from Oct. i3th to 10 14th Figure reduced to two-thirds of original scale. Between 5 and the leaf descended in a straight line, and at the latter hour it appeared vertically dependent. But between and the line consisted of a succession of steps, the cause of which we could not understand; it was, however, manifest that the movement was no longer a simple descending one. Siegesbeckia orientalis (Compositse).—Some seedlings were raised in the middle of winter and kept in the hot-house; they flowered, but did not grow well, and their leaves never showed any signs of sleep. The leaves on other seedlings raised in May wwre horizontal at noon (June 22ud), and depended at a consi'. 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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