100. (Fig. 106.) GOSSYPIUM ROOT BARK. Cotton root bark. U. S. Fl. ex. 30. Baumwollrinde, Baumwoll-Wurzelrinde, G. Ecorce de la racine de cotonnier, Fr. The root bark of Gossypium herbaceum L., Malvaceæ. Odorless. Slightly pungent, astringent and mucilaginous. Some large celled cork. Thin-walled inner parenchyma with simple and compound starch granules and aggregate crystals of calcium oxalate. Numerous long slender bast cells. Some tissue with reddish brown coloring matter. Porous tracheids and ducts. Ash 5.5 per cent. Rarely adulterated. 101. (Fig. 107.) GRANATUM. Pomegranate. U. S. Fl. ex. 60. Coarse powder. Bark of pomegranate, E. Granatrinde, G. Grenadier, Ecorce de balaustier, Fr. The root bark of Punica Granatum L., Punicaceae. The stem bark is also used. Very light yellowish brown. Odorless. Bitter, astringent. Outer cork tissue; middle parenchyma small celled, collenchymatous; inner parenchyma small celled bearing numerous aggregate crystals of calcium oxalate arranged in rows; some prismatic crystals. A few rather large, thick-walled, porous, more or less branching, colorless sclerenchyma cells. No bast. Ash 15 per cent. Histology of stem bark identical with that of root bark. Adulterated with bark of Buxus sempervirens and Berberis vulgaris. 102. GRANATUM. Pomegranate. Stem bark. Names and origin as for root bark. Very light brown. Odor and taste as for root bark. Histology identical with that of root bark. The presence of spores (of fungi and lichens) and hyphal remnants would indicate the stem bark, as spot fungi and lichens do not grow on the root bark. Ash 14 per cent. May be intermixed with root bark. |