. The topography of the chlorophyll apparatus in desert plants. Chlorophyll; Desert plants; Plants. FRANSERIA DUMOSA. 17 as follows: The epidermis has a relatively thin cuticle. At a distance of cm. from the tip its contents are colorless, but in the older parts a dark purple pigment is present. As previously mentioned, multicellular hairs and other hairs occur; these are to be found most abundant, perhaps, where no pigment is present in the epidermis. The secretion from these hairs, which is soluble in chloroform and ether, is so copious as to nearly sub- merg-e them, and covers the stem
. The topography of the chlorophyll apparatus in desert plants. Chlorophyll; Desert plants; Plants. FRANSERIA DUMOSA. 17 as follows: The epidermis has a relatively thin cuticle. At a distance of cm. from the tip its contents are colorless, but in the older parts a dark purple pigment is present. As previously mentioned, multicellular hairs and other hairs occur; these are to be found most abundant, perhaps, where no pigment is present in the epidermis. The secretion from these hairs, which is soluble in chloroform and ether, is so copious as to nearly sub- merg-e them, and covers the stem as far as the location of cork. The cortex. Fig. 7.—Franseria dumosa: A, transverse section of stem mm. in diameter, showing general distribution of chloro- phyll; 5,detail of A, to show character of cortical chloren- chyma; C, secreting hair from young part of stem, to show presence of chlorophyll, which is indicated by stippling, on periphery of cells. The cells of the epidermis do not con- tain chlorophyll. in stems mm. in diameter and 5 cm. from the tip is composed of four well-defined tissues, which, enumerated from without, are coUenchyma, parenchyma, hard bast, and soft bast. The coUenchymatous and the par- enchymatous portions are chlorophyll-bearing; some chlorophyll may also be found in the ground-tissue between the hard bast and the cambium. The parenchyma exterior to the hard bast contains chlorophyll and is made up of cuboid cells with large intercellular 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 Cannon, William Austin, 1870-; Knox, Alice Adelaide. Induction, development, and heritability of fasciations. Washington, Carnegie Institution of Washington
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1908
