. American journal of pharmacy . Fig. 1. Triticum repens. the sclerenchyma have comparatively thick walls and are filled withstarch grains (Fig. 2). Starch does not occur in any quantity inany of the other species examined. This starch gives a character-. Fig. 2. Cynodon Dactylon. istic white appearance to the cut surface of the rhizome. The centeris frequently, but not always, hollow as in couch grass. Commercial samples can be examined for this grass very clean, transverse cut with a sharp knife or a razor displays the -Am. Tour. 1919. } Triticum Re pens. 6S7 two lacu
. American journal of pharmacy . Fig. 1. Triticum repens. the sclerenchyma have comparatively thick walls and are filled withstarch grains (Fig. 2). Starch does not occur in any quantity inany of the other species examined. This starch gives a character-. Fig. 2. Cynodon Dactylon. istic white appearance to the cut surface of the rhizome. The centeris frequently, but not always, hollow as in couch grass. Commercial samples can be examined for this grass very clean, transverse cut with a sharp knife or a razor displays the -Am. Tour. 1919. } Triticum Re pens. 6S7 two lacunae and the yellowish ring of sclerenchyma. A drop oftincture of iodine gives a black color with the white,, starchy surface. Hole us mollis.—The ring of sclerenchyma in this case is moreor less hypodermal, like the outer ring in Triticum re pens. It is atleast twice as broad, and encloses some vascular bundles. Smallislands of parenchyma occur at intervals below the epidermis, andrudimentary stomata are present outside such groups of cells(Fig. 3). Each of the scattered, central, vascular bundles has a sclerenchymatous sheath one or two cells wide. This species re-sembles dog grass in the oval shape of its section and in the hollowcenter, but i
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Keywords: ., bookcentury1800, bookdecade183, booksubjectpharmacy, bookyear1835
