Book contents
- Frontmatter
- Contents
- CHAPTER I DROSERA ROTUNDIFOLIA, OR THE COMMON SUN-DEW
- CHAPTER II THE MOVEMENTS OF THE TENTACLES FROM THE CONTACT OF SOLID BODIES
- CHAPTER III AGGREGATION OF THE PROTOPLASM WITHIN THE CELLS OF THE TENTACLES
- CHAPTER IV THE EFFECTS OF HEAT ON THE LEAVES
- CHAPTER V THE EFFECTS OF NON-NITROGENOUS AND NITROGENOUS ORGANIC FLUIDS ON THE LEAVES
- CHAPTER VI THE DIGESTIVE POWER OF THE SECRETION OF DEOSERA
- CHAPTER VII THE EFFECTS OF SALTS OF AMMONIA
- CHAPTER VIII THE EFFECTS OF VARIOUS OTHER SALTS, AND ACIDS, ON THE LEAVES
- CHAPTER IX THE EFFECTS OF CERTAIN ALKALOID POISONS, OTHER SUBSTANCES AND VAPOURS
- CHAPTER X ON THE SENSITIVENESS OF THE LEAVES, AND ON THE LINES OF TRANSMISSION OF THE MOTOR IMPULSE
- CHAPTER XI RECAPITULATION OF THE CHIEF OBSERVATIONS ON DROSERA ROTUNDIFOLIA
- CHAPTER XII ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF DROSERA
- CHAPTER XIII DIONÆA MUSCIPULA
- CHAPTER XIV ALDROVANDA VESICULOSA
- CHAPTER XV DROSOPHYLLUM — RORIDULA — BYBLIS — GLANDULAR HAIRS OF OTHER PLANTS — CONCLUDING REMARKS ON THE DROSERACEÆ
- CHAPTER XVI PINGUICULA
- CHAPTER XVII UTRICULARIA
- CHAPTER XVIII UTRICULARIA (continued)
- ERRATA
- INDEX
CHAPTER XII - ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF DROSERA
Published online by Cambridge University Press: 29 August 2010
- Frontmatter
- Contents
- CHAPTER I DROSERA ROTUNDIFOLIA, OR THE COMMON SUN-DEW
- CHAPTER II THE MOVEMENTS OF THE TENTACLES FROM THE CONTACT OF SOLID BODIES
- CHAPTER III AGGREGATION OF THE PROTOPLASM WITHIN THE CELLS OF THE TENTACLES
- CHAPTER IV THE EFFECTS OF HEAT ON THE LEAVES
- CHAPTER V THE EFFECTS OF NON-NITROGENOUS AND NITROGENOUS ORGANIC FLUIDS ON THE LEAVES
- CHAPTER VI THE DIGESTIVE POWER OF THE SECRETION OF DEOSERA
- CHAPTER VII THE EFFECTS OF SALTS OF AMMONIA
- CHAPTER VIII THE EFFECTS OF VARIOUS OTHER SALTS, AND ACIDS, ON THE LEAVES
- CHAPTER IX THE EFFECTS OF CERTAIN ALKALOID POISONS, OTHER SUBSTANCES AND VAPOURS
- CHAPTER X ON THE SENSITIVENESS OF THE LEAVES, AND ON THE LINES OF TRANSMISSION OF THE MOTOR IMPULSE
- CHAPTER XI RECAPITULATION OF THE CHIEF OBSERVATIONS ON DROSERA ROTUNDIFOLIA
- CHAPTER XII ON THE STRUCTURE AND MOVEMENTS OF SOME OTHER SPECIES OF DROSERA
- CHAPTER XIII DIONÆA MUSCIPULA
- CHAPTER XIV ALDROVANDA VESICULOSA
- CHAPTER XV DROSOPHYLLUM — RORIDULA — BYBLIS — GLANDULAR HAIRS OF OTHER PLANTS — CONCLUDING REMARKS ON THE DROSERACEÆ
- CHAPTER XVI PINGUICULA
- CHAPTER XVII UTRICULARIA
- CHAPTER XVIII UTRICULARIA (continued)
- ERRATA
- INDEX
Summary
I examined six other species of Drosera, some of them inhabitants of distant countries, chiefly for the sake of ascertaining whether they caught insects. This seemed the more necessary as the leaves of some of the species differ to an extraordinary degree in shape from the rounded ones of Drosera rotundifolia. In functional powers, however, they differ very little.
Drosera anglica (Hudson).—The leaves of this species, which was sent to me from Ireland, are much elongated, and gradually widen from the footstalk to the bluntly pointed apex. They stand almost erect, and their blades sometimes exceed 1 inch in length, whilst their breadth is only the ⅕ of an inch. The glands of all the tentacles have the same structure, so that the extreme marginal ones do not differ from the others, as in the case of Drosera rotundifolia. When they are irritated by being roughly touched, or by the pressure of minute inorganic particles, or by contact with animal matter, or by the absorption of carbonate of ammonia, the tentacles become inflected; the basal portion being the chief seat of movement. Cutting or pricking the blade of the leaf did not excite any movement. They frequently capture insects, and the glands of the inflected tentacles pour forth much acid secretion. Bits of roast meat were placed on some glands, and the tentacles began to move in 1 m. or 1 m. 30 s.; and in 1 hr. 10 m. reached the centre. […]
- Type
- Chapter
- Information
- Insectivorous Plants , pp. 278 - 285Publisher: Cambridge University PressPrint publication year: 2009