Arrangements of vegetable tissues and organs, analyses of natural orders, and other tables : for the use of students of botany.

Date:
1846
Catalogue details

Licence: Public Domain Mark

Credit: Arrangements of vegetable tissues and organs, analyses of natural orders, and other tables : for the use of students of botany. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    OF VEGETABLE TISSUES AND ORGANS, ANALYSES OF NATURAL ORDERS, AND OTHER TABLES, FOR THE USE OF STUDENTS OF BOTANY. I.—Various Forms or Cellular Tissue. 1. Dodecahedral Cellular tissue (Hexagonienchyma), called by some true Pa- renchyma, seen in the pith of some plants. 2. Elliptical, Oval, and Spheri- cal (Merenchyma, Ovenchyma, and Sphcvrenchyma), common in herbaceous plants. 3. Cubical (Cubenchyma), seen in the Gourd. 4. Columnar, di- vided into Cylindrical (Cylindrenchyma), seen in Chara ; and Prismatical (Prismenchyma), seen in the bark of plants. Prismatical when compressed becomes Muriform, as in the medullary rays of woody stems. 5. Conical (Conenchyma), in hairs. 6. Fusiform or Spindle-shaped (Prosenchyma or Atractenchyma), seen in Misleto. 7. Stellated or Star-like (Actinenchyma), seen in Musa, and in the hairs of Deutzia scabra. 8. Sinuous (Col- penchyma), in the cuticle of leaves. 9. Branched (Cladenckyma), in some hairs. 10. Tabular (Pinenchyma), in the outer bark. 11. Entangled (Dcedalenchymd), in some Fungi as Amanita muscaria. II.—Arrangement of Vegetable Tissues. A. Cellular Tissue (Parenchyma), composed of membrane or of membrane and fibre, in the form of cells whose length does not greatly exceed their breadth. 1. Membranous, formed by membrane alone. 2. Fibrous (Inenchyma), formed by membrane and fibre; occasionally, ac- cording to some, formed by fibre alone. a. Porous Cells (Articulated Bothrenchyma or Taphrenchyma), or Cells with pits or depressions on their walls. b. Dotted Cells, or Cells with opaque spots which are probably portions of fibre. Vascular or Tubular Tissue (Angienchyma), composed of cylindrical tubes, which are continuous, and overlie each other at the ends. I. Membranous Vascular Tissue, composed of tubes which are not marked by fibres or dots. 1. Ligneous Tissue (Pleurenchyma), composed of fusiform tubes with thickened walls. 2. Laticiferous Tissue (Cinenchyma), composed of tubes which anastomose, and convey a peculiar fluid called Latex.