. Freaks and marvels of plant life; or, Curiosities of vegetation. Plant anatomy. SLEEP OF PLANTS. 247 roof over the edges of the closed side leaflets. By this means a kind of cone is formed with the apex towards the footstalk (fig. 39). The middle leaflet in this movement passes through an angle of 900 to 140° The falling of the middle leaflet in this " clover" was observed on the morning of two days. On the first day the leaflet fell between eight o'clock in the morn- ing and three in the afternoon. On the second day it fell between seven. Fig- 39-" -Leaflets of clover awake a
. Freaks and marvels of plant life; or, Curiosities of vegetation. Plant anatomy. SLEEP OF PLANTS. 247 roof over the edges of the closed side leaflets. By this means a kind of cone is formed with the apex towards the footstalk (fig. 39). The middle leaflet in this movement passes through an angle of 900 to 140° The falling of the middle leaflet in this " clover" was observed on the morning of two days. On the first day the leaflet fell between eight o'clock in the morn- ing and three in the afternoon. On the second day it fell between seven. Fig- 39-" -Leaflets of clover awake and asleep. o'clock in the morn- ing and one in the afternoon. After this fall the leaflet began to rise again, but slowly, until four o'clock, when the rapid rise for the evening It is interesting to compare these two little plants with trifoliate leaves, and ob- serve how the same end is attained, by two diverse and opposite means, the one by rising, the other by falling ; but both equally decided and remarkable. The melilot is another plant with trifoliate leaves, and this exhibits a different class of movements in its nocturnal gyrations. Darwin has thus described the process which he observed. " The three leaflets 1 Darwin, " Movements of Plants," p. 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 Cooke, M. C. (Mordecai Cubitt), b. 1825. London, Society for Promoting Christian Knowledge; New York, E. & J. B. Young
Size: 1989px × 1256px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectplantanatomy, bookyea
