CHAPTER VIII.

THE EFFECTS OF VARIOUS OTHER SALTS, AND ACIDS, ON THE LEAVES.

Salts of sodium, potassium, and other alkaline, earthy, and metallic salts--Summary on the action of these salts--Various acids--Summary on their action...174-198 [page viii.]

CHAPTER IX.

THE EFFECTS OF CERTAIN ALKALOID POISONS, OTHER SUBSTANCES AND VAPOURS.

Strychnine, salts of--Quinine, sulphate of, does not soon arrest the movement of the protoplasm--Other salts of quinine--Digitaline--Nicotine--Atropine--Veratrine--Colchicine-- Theine--Curare--Morphia--Hyoscyamus--Poison of the cobra, apparently accelerates the movements of the protoplasm--Camphor, a powerful stimulant, its vapour narcotic--Certain essential oils excite movement--Glycerine--Water and certain solutions retard or prevent the subsequent action of phosphate of ammonia--Alcohol innocuous, its vapour narcotic and poisonous--Chloroform, sulphuric and nitric ether, their stimulant, poisonous, and narcotic power--Carbonic acid narcotic, not quickly poisonous--Concluding remarks...Pages 199-228

CHAPTER X.

ON THE SENSITIVENESS OF THE LEAVES, AND ON THE LINES OF TRANSMISSION OF THE MOTOR IMPULSE.

Glands and summits of the tentacles alone sensitive--Transmission of the motor impulse down the pedicels of the tentacles, and across the blade of the leaf--Aggregation of the protoplasm, a reflex action--First discharge of the motor impulse sudden--Direction of the movements of the tentacles--Motor impulse transmitted through the cellular tissue-- Mechanism of the movements--Nature of the motor impulse--Re-expansion of the tentacles...229-261

CHAPTER XI.

RECAPITULATION OF THE CHIEF OBSERVATIONS ON DROSERA ROTUNDIFOLIA.

262-277 [page ix.]

CHAPTER XII.

ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF DROSERA.

Drosera anglica--Drosera intermedia--Drosera capensis--Drosera spathulata--Drosera filiformis--Drosera binata--Concluding remarks...Pages 278-285

CHAPTER XIII.

DIONAEA MUSCIPULA.

Structure of the leaves--Sensitiveness of the filaments--Rapid movement of the lobes caused by irritation of the filaments--Glands, their power of secretion--Slow movement caused by the absorption of animal matter--Evidence of absorption from the aggregated condition of the glands--Digestive power of the secretion--Action of chloroform, ether, and hydrocyanic acid- -The manner in which insects are captured--Use of the marginal spikes--Kinds of insects captured--The transmission of the motor impulse and mechanism of the movements-- Re-expansion of the lobes...286-320

CHAPTER XIV.

ALDROVANDA VESICULOSA.

Captures crustaceans--Structure of the leaves in comparison with those of Dionaea-- Absorption by the glands, by the quadrifid processes, and points on the infolded margins-- Aldrovanda vesiculosa, var. australis--Captures prey--Absorption of animal matter-- Aldrovanda vesiculosa, var. verticillata--Concluding remarks...321-331

CHAPTER XV.

DROSOPHYLLUM--RORIDULA--BYBLIS--GLANDULAR HAIRS OF OTHER PLANTS-- CONCLUDING REMARKS ON THE DROSERACEAE.

Drosophyllum--Structure of leaves--Nature of the secretion--Manner of catching insects-- Power of absorption--Digestion of animal substances--Summary on Drosophyllum--Roridula- -Byblis--Glandular hairs of other plants, their power of absorption--Saxifraga--Primula-- Pelargonium--Erica--Mirabilis--Nicotiana--Summary on glandular hairs--Concluding remarks on the Droseraceae...332-367 [page x.]

CHAPTER XVI.

PINGUICULA.

Pinguicula vulgaris--Structure of leaves--Number of insects and other objects caught-- Movement of the margins of the leaves--Uses of this movement--Secretion, digestion, and absorption--Action of the secretion on various animal and vegetable substances--The effects of substances not containing soluble nitrogenous matter on the glands--Pinguicula grandiflora--Pinguicula lusitanica, catches insects--Movement of the leaves, secretion and digestion...Pages 368-394

CHAPTER XVII.

UTRICULARIA.

Utricularia neglecta--Structure of the bladder--The uses of the several parts--Number of imprisoned animals--Manner of capture--The bladders cannot digest animal matter, but absorb the products of its decay--Experiments on the absorption of certain fluids by the quadrifid processes--Absorption by the glands--Summary of the observation on absorption-- Development of the bladders--Utricularia vulgaris--Utricularia minor--Utricularia clandestina...395-430

CHAPTER XVIII.

UTRICULARIA (continued).

Utricularia montana--Description of the bladders on the subterranean rhizomes--Prey captured by the bladders of plants under culture and in a state of nature--Absorption by the quadrifid processes and glands--Tubers serving as reservoirs for water--Various other species of Utricularia--Polypompholyx--Genlisea, different nature of the trap for capturing prey-- Diversified methods by which plants are nourished...431-453

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INDEX...455-462

Insectivorous Plants Page 03

19th Century English Literature

Charles Darwin

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Charles Darwin

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