. British plants : their biology and ecology. Plants; Plant ecology. INFLUENCE OF WATER ON LAND-PLANTS 45 thorns; in less xerophytic situations the thorns are absent. Certain peculiarities in the arrangement and display of the leaves are also to be recognized as xerophytic adaptations. The hygro- phytic type of leaf spreads out its surface to catch as much light as possible, and the leaves are so arranged,. Fig. 14.—Cytisus scoparius (Common Broom). (Slightly Magnified.) 1. Transverse section of green assimi- lating stem. a, sclerenchyma ; b, chlorophyll - tissue ; c, cortex ; d, phloem ; e, c
. British plants : their biology and ecology. Plants; Plant ecology. INFLUENCE OF WATER ON LAND-PLANTS 45 thorns; in less xerophytic situations the thorns are absent. Certain peculiarities in the arrangement and display of the leaves are also to be recognized as xerophytic adaptations. The hygro- phytic type of leaf spreads out its surface to catch as much light as possible, and the leaves are so arranged,. Fig. 14.—Cytisus scoparius (Common Broom). (Slightly Magnified.) 1. Transverse section of green assimi- lating stem. a, sclerenchyma ; b, chlorophyll - tissue ; c, cortex ; d, phloem ; e, cambium ; /, xylem ; g, pith; h, epidermis possessing stomata at intervals. 2. Portion of outer tissues, magnified more highly to show thick cuticle (a), epidermis (b). and chlorophyll- tissue (c). Fig. 15. — Buscus aculeatus (Butcher's-Broom), showing Cladodes arising in Axils of Leaves and Each bearing a Flower. (Natural Size. After Kerner.) with respect to each other, that every avail- able portion of space upon which light falls is occupied by a leaf (see leaf-mosaic, p. 68). The leaves of xerophytes, on the other hand, are not displayed in this way. Direct sunlight promotes transpiration, and as this is. 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 Bevis, James Frederick; Jeffery, Henry John. London : A. Rivers
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectplants
