. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . n cross section. 5 spermoderm con-sists of cp epidermis, col collenchyma, pal \outer thin-walled portion of palisade layer,pal- inner thick-walled portion of palisadelayer, and p parenchyma; E endosperm;C cotyledon with aep outer epidermis and alaleurone cells. X160. (K. B. Wintox.) 178 OIL SEEDS. plays the mucilaginous substance deposited in layers with a distinct cyl-indrical cavity in the axis of each cell. In surface view, concentric ringsand often radial clefts are
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . n cross section. 5 spermoderm con-sists of cp epidermis, col collenchyma, pal \outer thin-walled portion of palisade layer,pal- inner thick-walled portion of palisadelayer, and p parenchyma; E endosperm;C cotyledon with aep outer epidermis and alaleurone cells. X160. (K. B. Wintox.) 178 OIL SEEDS. plays the mucilaginous substance deposited in layers with a distinct cyl-indrical cavity in the axis of each cell. In surface view, concentric ringsand often radial clefts are evident. 2. Collenchyma (col). Characteristic of white mustard are the sub-epidermal cells with collenchymatously thickened angles and triangularintercellular spaces. These are of about the size of the epidermal cellsand are usually in two layers. 3. Palisade Cells {pal^ and pal-). Radially elongated cells, thickenedin the inner half, form the most conspicuous layer of the seed, thethickened walls forming a kind of cup, hence the name beaker great diagnostic importance are the colorless, thickened walls, which. Fig. 144a. White Mustard. Elements of seed in surface view. Significance of referenceletters as in Fig. 144. X160. (K. B. Winton.) in most economic cruciferous seeds are brown. As these cells arc ofnearly uniform height, pronounced reticulations are not evident on theseed. In surface view the cells are sharply polygonal, varying up to22 /i in diameter. 4. Inner Layers (/»). Two or more layers of thin-walled isodiametricor elongated cells complete the spermoderm. These cells, unlike thecorres])(jn(ling layer of many cruciferous seeds, do not contain a pigment. Endosperm (E). i. Aleuronc Cells. These cells resemi)le closelythe aleurone cells of cereals. They arc 10 4o/( in diameter, ha\e walls, and contain fat globules and polygonal or rounded aleuronegrains 1-4 /« in diameter. 2. Oblileratcd Parenchyma. The remainder of the endosperm con-sists o
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