. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 146 HYDATHODES with the absence of the characteristic thickenings in the guard- cehs ; in surface sections they chiefly differ in their more rounded form (Fig. 72). In some plants but a single water-pore is asso- ciated with each hydathode { Enchanter's Nightshade, Fuchsia), but in others they arc numerous { Wild Strawberry), and occasionally grouped in shallow depressions that can be recognised with the unaided eye { Marsh Marigold). In a longitudinal section through an entire hydathode of this.
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 146 HYDATHODES with the absence of the characteristic thickenings in the guard- cehs ; in surface sections they chiefly differ in their more rounded form (Fig. 72). In some plants but a single water-pore is asso- ciated with each hydathode { Enchanter's Nightshade, Fuchsia), but in others they arc numerous { Wild Strawberry), and occasionally grouped in shallow depressions that can be recognised with the unaided eye { Marsh Marigold). In a longitudinal section through an entire hydathode of this. Fig. 72.—Water-pores {) of the Lesser Celandine (Ficaria verna) seen from the surface. St., a normal stoma on the same scale for com- parison. type (Fig. j^) the end of the vascular bundle, which is here seen to consist of tracheids only, usually enlarges somewhat, often in a cup-shaped manner. Between the tracheids and the overlying water-pores there is commonl)' a small-celled tissue, the cpithem {ep), composed of cells with prominent nuclei and dense c^'to- plasmic contents ; there is often, however, a space immediately beneath the epidermis. The epithem is tra\-ersed bj' a system of fine intercellular spaces through which the water passes from the tracheids to the water-pores. In many Monocotylcdonous water-plants { Water Plantain, Alisina plantago) the tissue. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fritsch, Felix Eugene, 1879-; Salisbury, E. J. (Edward James), Sir, b. 1886. London, G. Bell and sons ltd.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
