Insectivorous Plants

Insectivorous Plants

CHAPTER I. DROSERA ROTUNDIFOLIA, OR THE COMMON SUN-DEW. Number of insects capturedDescription of the leaves and their appendages or tentacles Preliminary sketch of the action of the various parts, and of the manner in which insects are capturedDuration of the inflection of the tentaclesNature of the secretionManner in which insects are carried to the centre of the leafEvidence that the glands have the power of absorptionSmall size of the roots. CHAPTER II. THE MOVEMENTS OF THE TENTACLES FROM THE CONTACT OF SOLID BODIES. Inflection of the exterior tentacles owing to the glands of the disc being excited by repeated touches, or by objects left in contact with themDifference in the action of bodies yielding and not yielding soluble nitrogenous matterInflection of the exterior tentacles directly caused by objects left in contact with their glandsPeriods of commencing inflection and of subsequent re-expansionExtreme minuteness of the particles causing inflectionAction under waterInflection of the exterior tentacles when their glands are excited by repeated touchesFalling drops of water do not cause inflection. CHAPTER III. AGGREGATION OF THE PROTOPLASM WITHIN THE CELLS OF THE TENTACLES. Nature of the contents of the cells before aggregationVarious causes which excite aggregationThe process commences within the glands and travels down the tentacles Description of the aggregated masses and of their spontaneous movementsCurrents of protoplasm along the walls of the cellsAction of carbonate of ammoniaThe granules in the protoplasm which flows along the walls coalesce with the central massesMinuteness of the quantity of carbonate of ammonia causing aggregationAction of other salts of ammoniaOf other substances, organic fluids, &c.Of waterOf heatRedissolution of the aggregated massesProximate causes of the aggregation of the protoplasmSummary and concluding remarksSupplementary observations on aggregation in the roots of plants. ......Buy Now (To Read More)

Product details

Ebook Number: 5765
Author: Darwin, Charles
Release Date: May 1, 2004
Format: eBook
Language: English