. Elements of biology; a practical text-book correlating botany, zoology, and human physiology. Biology. ^'sa^^f^''' :^S£Sft*Sfe*h: -*3^-^=f?c?^>-^ ,^&^_ â¢Â«. m. â¢3k ,1L â . Xerophytic conditions. A typical desert. Halophytes. â If the water or saturated soil in which the plant lives contains salts, such as sea salt or the al|<:ali salts of some of our Western lakes, then the conditions are said to be halopJiytic, and a plant living under such conditions is known as a halophyte. Halophytes show many characteristics which xerophytes show, spines or hairs, thick epidermis, fle
. Elements of biology; a practical text-book correlating botany, zoology, and human physiology. Biology. ^'sa^^f^''' :^S£Sft*Sfe*h: -*3^-^=f?c?^>-^ ,^&^_ â¢Â«. m. â¢3k ,1L â . Xerophytic conditions. A typical desert. Halophytes. â If the water or saturated soil in which the plant lives contains salts, such as sea salt or the al|<:ali salts of some of our Western lakes, then the conditions are said to be halopJiytic, and a plant living under such conditions is known as a halophyte. Halophytes show many characteristics which xerophytes show, spines or hairs, thick epidermis, fleshy leaves, all being characters which show that the water supply of the plant is limited. The density of the salt water in the soil makes it difficult for the plant to absorb water; hence these characters are developed. Mesophytes. â Most plants in the Temperate Zone occupy a place midway between the xerophytes on one hand and hydro- phytes on the other. They are plants which require a moderate amount of water in the soil and air surrounding them. Such are most of our forest and fruit trees, and many of our garden vege- tables. Conditions of moderate moisture are called mesopJujtic; the plants living thus are known as mesophytes. It may easily be seen that plants which are mesophytes at one time may under some conditions of weather be forced to undergo xerophytic or hydrophytic conditions. An oak tree may receive no water through the roots during the winter because the surface hunter's BIOL.â 10. 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 Hunter, George William, 1873-1948. New York, American book company
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