Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . lowers of Hyoscyamus pallidus.—After Newcomb. Newcomb and Hayner obtained per cent of alkaloids inthe flowering tops of Hyoscyamus niger and per cent of alkaloidsin H. pallidus (Amer. Jour. Pharm., 1916, 88, p. 1). Hyoscyamus Muticus.—The leaves and flowering tops of Hyos-cyamus muticus, a plant growing in Egypt, are sometimes admixedwith and substituted for Hyoscyamus niger. It yields about
Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . lowers of Hyoscyamus pallidus.—After Newcomb. Newcomb and Hayner obtained per cent of alkaloids inthe flowering tops of Hyoscyamus niger and per cent of alkaloidsin H. pallidus (Amer. Jour. Pharm., 1916, 88, p. 1). Hyoscyamus Muticus.—The leaves and flowering tops of Hyos-cyamus muticus, a plant growing in Egypt, are sometimes admixedwith and substituted for Hyoscyamus niger. It yields about cent of alkaloids, consisting in a large part of Hyoscyamine. Itspresence in either the crude or powdered drug of Hyoscyamus maybe determined by the characteristic branching non-glandular hairsoccurring on both the stems and leaves (Fig. 263). DUBOISIA 601 Allied Plants.—Hyoscyamine is also found in Datura Stramonium,Atropa Belladonna, Anisodus luridus, Duboisia myoporoides, Lactucasativa and L. virosa, the two latter plants belonging to the Com-posite. Hyoscine (scopolamine) is also present in belladonna root,the seeds of Hyoscyamus niger, the leaves of Datura Stramonium,. Fig. 262.—Hyoscyamus: a, surface view of cells of the epidermis, showing alsoa single stoma; b, surface view of cells of the lower epidermis and 2 stomata;c, uniseriate non-glandular hairs; d, glandular hairs; e, monoclinic prisms ofcalcium oxalate; /, fragment of xylem showing the wood fibers (w), andtracheae having simple pores (p), bordered pores (s), and spiral thickenings(I); g, three bast fibers in transverse section. Datura fastuosa of the East Indies, the leaves of Duboisia myo-poroides and the roots of Scopolia japonica and S. atropoides. Duboisia leaves are obtained from|Duboisia myoporoides, a largeshrub indigenous to Australia. They are short-petiolate, 7 to 10cm. in length, to cm. in breadth, having an acute or narrow 602 SCIENTIFIC AND APPLIED PHARMACOGNOSY summit and base, an
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