. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . maturity and are of no diagnostic importance. Pericarp (Figs. 90 and 91). The ventral side is flat and has a darkcolored spot, the remains of the hilum, near the base. Extending half-way from the base to the apex on the dorsal side is a groove, which marksthe position of the cmbr)o. 1. Epicarp. (ep). As in the outer epidermal layers of tlie floralenvelopes the cells are elongated and wa\T in outhne. On the darkcolored spot already referred to, the epidermal cells are mor
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . maturity and are of no diagnostic importance. Pericarp (Figs. 90 and 91). The ventral side is flat and has a darkcolored spot, the remains of the hilum, near the base. Extending half-way from the base to the apex on the dorsal side is a groove, which marksthe position of the cmbr)o. 1. Epicarp. (ep). As in the outer epidermal layers of tlie floralenvelopes the cells are elongated and wa\T in outhne. On the darkcolored spot already referred to, the epidermal cells are more or lessrectangular. 2. The Cross Cells (q) are similar to the tube cells in form, but areusually shorter, broader, and more irregular in shape. 3. Tube Cells (sch). These are 2-4 // wide and often reach tlie lengthof 300 fl. Perisperm (TV). After treatment with alkali, tliis layer is clearly seenin surface view. The cells arc of large size and have beaded walls. GREEN FOXTAIL. 123 Endosperm, i. Aleurone Layer (al). The cells are 10-20 /x indiameter. 2. Starch Cells (Fig. 90, s). Polygonal starch grains with conspicu-. FlG. 90. Green Foxtail. Cross section of outer portion of fruit. F pericarp consists ofep epicarp, q cross cells, and sch tube cells; N perisperm; E endosperm consists ofal aleurone cells and 5 starch cells. X300. (Winton.) ous hilum fill the parenchyma cells of the endosperm. In the outerlayers they are from 4-8 ^ in diameter, but further inward they reachthe maximum diameter of 18 //. After dissolving the starch with alkali, there remains a network of
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