An introduction to physiological and systematical botany / by James Edward Smith.
- James Edward Smith
- Date:
- 1814
Licence: Public Domain Mark
Credit: An introduction to physiological and systematical botany / by James Edward Smith. Source: Wellcome Collection.
Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)
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![In grasses and some other plants the ingenious Mr. Davy has found a flinty substance in the cuticle. What seems to be the cuticle on the trunk of the Plane, the Fir, and a kind of Willow called Salix trian- dra, rather consists of scales of bark, which having per- formed their functions and become dead matter, are re- jected by the increasing bark beneath them ;(3) and this accords with M. Mirbel's idea of the cuticle. The old layers of bark in the Chestnut, Oak, and many other trees, though not cast off, are of the same nature ; and these under the microscope exhibit the same cellular texture as the real cuticle. (3^ [Hence the while appearance exhibited at certain seasons of the year by the trunk and branches of the Button wood tree (Platanus occidentalis.)]](https://iiif.wellcomecollection.org/image/b21155094_0045.jp2/full/800%2C/0/default.jpg)
