Volume 4

Descriptive and illustrated catalogue of the physiological series of comparative anatomy contained in the museum of the Royal College of Surgeons in London.

  • Royal College of Surgeons of England. Museum.
Date:
1833-1840
Catalogue details

Licence: Public Domain Mark

Credit: Descriptive and illustrated catalogue of the physiological series of comparative anatomy contained in the museum of the Royal College of Surgeons in London. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

    23/260 (page 15)
    are shown at the base of the calyx with which the seed receptacle is con- fluent. The parts of fructification correspond with the type of the Lin- nean class and order Icosandria Monogynia. Nat. Ord. CereoE or CactecB. 2256. A transverse section of a flower of the same species, carried through the tubular part of the calyx, above the point of liberation of the greater number of the stamens ; the central canal of the style, along which, in many plants, the pollen tubes have been observed to be conveyed, may be seen with the naked eye in this large and beautiful flower. 2257. A portion of the flower of a Wild Rose {Rosa canina, Linn.) : most of the sepals and petals are removed, showing the numerous stamens and pistils which characterize the class Icosandria and order Polygynia of Linnaeus. (Nat. Ord. RosacecB). 2258. The flower of the Lotus {Nymph(Ea Lotus, Linn.), part of the calyx and corolla has been removed to expose the essential organs of fructification. These present the conditions characteristic of ihe Linnean class and order Polyandria Monogynia. All the stamens adhere to or are inserted into the germen; the exterior ones are dilated at the base, as if in a transitional state between petals and filaments. The stigma or fertili- zable surface of the pistil is of a stellato-radiate form, glanduliferous in the middle, and of such an extent as to require for the due fertilization of the ova the profusion of poUiniferous organs which surround it. The Nymphaea is remarkable for the obedience of its petals to the stimulus of light. It closes its flowers in the evening, and lays them down on the surface of the water till morning, when it expands them, and often in a bright day they are raised to several inches above the water. These actions are described by Theophrastus in the plant which he calls Lotus, and which may have been the Nymplma Lotus of Linnaeus. 2259. The summit of a stem of Cliffortia cuneata, Aiton, with several flowers ; these are apetalous, or devoid of a corolla ; the essential parts of genera- tion, according to Sprengel agree in number and disposition with the * See his edition of Linne's ' Systerna Vegetabilium,' vol. ii. p. 611, No. gen. 1977. (1825).