The elements of botany, structural, physiological, systematicl, and medical. Being a fifth edition of the Outline of the first principles of botany. With a sketch of the artificial methods of classification and a glossary of technical terms / By John Lindley.

  • Lindley, John, 1799-1865.
Date:
1847
Catalogue details

Licence: Public Domain Mark

Credit: The elements of botany, structural, physiological, systematicl, and medical. Being a fifth edition of the Outline of the first principles of botany. With a sketch of the artificial methods of classification and a glossary of technical terms / By John Lindley. Source: Wellcome Collection.

    21/266 (page 5)
    30. The function of the cellular tissue is to transmit fluids in all direc¬ tions ; the membrane of which it is composed is therefore permeable, although not in gene¬ ral furnished with vi¬ sible pores (18). When it is thickened by the deposition of the pro¬ toplasm (68) or scle- rogen, passages are left in the latter, communicating with the sides of the tissue, and giving it the appearance of being dotted or pitted (31). 31. Pitted Tissue (Bothrenchyma) is a modification of the cellular, either consisting of short cylindrical cells placed end to end,21 22 opening into each other, and forming continuous tubes ; or of long tubular cells 23 40. Its sides are marked by pits, resembling dots, produced in consequence of the protoplasm being unequally deposited over the inside of the cells. Fig. 16.—1. Antheridium of a moss; 2. four of its cells, each containing a spiral thread; 3. a spiral thread separate.—A. D. J. Fig. 16*.—1. Portion of the contents of the antheridium of Chara. Several jointed tubes t attached to a vesicle ; 2. the end of one of the tubes in which he the spiral threads, one escaping; 3. end of a tube which has already lost its spirals except the last cell; 4. the spiral and its cilia? free, as seen in water.— A. D. J. Fig. 17.—The spores of Algals, with their motile cilhe.