Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. . pod magnified. other plants in support. Great progress has been made in this departmentof botany within recent years. Darwin has shown that the tendrils of someplants continue in motion for some time in order to find something to clingto. The grapevine especially spends a long time in th
Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. . pod magnified. other plants in support. Great progress has been made in this departmentof botany within recent years. Darwin has shown that the tendrils of someplants continue in motion for some time in order to find something to clingto. The grapevine especially spends a long time in this labor if there isdifficulty in reaching a host. The plant preserves vital power all this time,but no sooner is support found, than nutrition is cut off, and the tendril dies,though, hard and wiry, it serves its parent plant as a support better dead STORY OF PLANT AND FLOWER 109. than alive. The amount of nutrition spent in sustaining motion is found tobe enormous. A vine that can find read}- means of support grows with amuch more healthy vigor than one that has difficulty in rinding it. Manyplants present illustrations. Much advance has been made in the knowledge of the motions of plants asregards their various forms. Growth in plants is not continuous; but is tseries of rests and advances. In otherwords it is rhythmic. The nodes, orknots, in the stems of grasses are rest-ing-places. When a rest occurs, energymay be exerted in a different direc-tion, and a change of form is well illustrated by the com-mon Dogwood of northern woods, Cor-nus florida on the eastern, and CornusNuttallii on the western slope of theAmerican continent. On the approachof winter the leaf is reduced to a budscale, and then rests. When spring re-turns these scales resume growth andappear as white bracts. In the annexedillustration the scales that served forwinter protection
Size: 1461px × 1710px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidtri, booksubjectinventions
