. The power of movement in plants . Plants; Botany. CUAF. L OXALIS. 25 ledons rise perpendicularly upwards at night so as to come into slose contact, instead of sinking vertically downwards, as in the case of 0. rosea. A glass filament was fixed to a cotyledon, "17 of an inch in length, and the hypocotyl was left free. On Fig. 14. 8°ia'iM». 1«* f,6'iO',J9^ F!g. 15. PisT I'SSfpM. vas' i'^mj Oxalk rosea : conjoint circumnutation of the cotyledons and hypocotyl, traced from on June 18th to 19th. The apex of the cotyledon stood only 3f inches from the yertical glass. Fi
. The power of movement in plants . Plants; Botany. CUAF. L OXALIS. 25 ledons rise perpendicularly upwards at night so as to come into slose contact, instead of sinking vertically downwards, as in the case of 0. rosea. A glass filament was fixed to a cotyledon, "17 of an inch in length, and the hypocotyl was left free. On Fig. 14. 8°ia'iM». 1«* f,6'iO',J9^ F!g. 15. PisT I'SSfpM. vas' i'^mj Oxalk rosea : conjoint circumnutation of the cotyledons and hypocotyl, traced from on June 18th to 19th. The apex of the cotyledon stood only 3f inches from the yertical glass. Figure here given one-half of original Oxalis Yuldiviana : conjoint circumnutation of a cotyle- don and the hypocotyl, traced on vertical glass, during 24 hours. Figure here given one-half of original scale;' seedling illuminated from above. the first day the seedling was placed too far from the vertical glass; so that the tracing was enormously exaggerated and the movement could not be traced when the cotyledon either rose or sank much; but it was clearly seen that the cotyledons rose thrice and fell twice between and Early on •jhe following morning (June 19th) the apex of a c«tykdon was. 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
Size: 1057px × 2364px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
