. The plant cell, its modifications and vital processes; a manual for students. Plant physiology; Plant anatomy; Plant cells and tissues. OUTER cf;lls and tissues. 29 with stomata whereby transpiration may be regulated, in order to cope with such conditions as draught; otherwise certain plants would wither in a few hours. Stomata are usually more numerous on the under surface of a leaf than oa tlie'Tipper aspect, and in some leaves may be greatly re'duced in number, in order <^n prevent ff^css?ivc loss- of water (leaves of plants in the Canary Islands, belonging to the genus Cddus)/'. Fig.
. The plant cell, its modifications and vital processes; a manual for students. Plant physiology; Plant anatomy; Plant cells and tissues. OUTER cf;lls and tissues. 29 with stomata whereby transpiration may be regulated, in order to cope with such conditions as draught; otherwise certain plants would wither in a few hours. Stomata are usually more numerous on the under surface of a leaf than oa tlie'Tipper aspect, and in some leaves may be greatly re'duced in number, in order <^n prevent ff^css?ivc loss- of water (leaves of plants in the Canary Islands, belonging to the genus Cddus)/'. Fig. 15.—a, The formation of a Stoma (two stages) in the Leaf of Prunus lauroceraius. b, A Stoma from the Leaf of Pinus, seen in section.—w, Vestibule ; e, epidermal-cells ; jr, guard-cells ; Ay, hypo- dermis ; rpc, respiratory cavity; c, mesopliyll cells. The stomata have, however, another and most important function—viz., that of admitting the gases of the atmosphere * The stomata also undergo certain changes whereby the aperture, or stoma proper, is closed at times, by variations in the turgidity of the guard-cells; this occurs at night 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 Haig, Harold Axel. London, C. Griffin and Company, Ltd.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantanatomy, bookyea
