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 . hem from the leaves of Vaccinium Vitis-Idsea. The presence of arbutin may also be determined in the leaves,by the methods of microsublimation already given under Chimaphila. Powder.—Yellowish-green to olive-green; fragments of polygonalepidermal cells associated with broadly elliptical stomata, about in length, surrounded by 5 to 8 neighboring cells; cells of meso-phyll with chloroplastids and freque
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 . hem from the leaves of Vaccinium Vitis-Idsea. The presence of arbutin may also be determined in the leaves,by the methods of microsublimation already given under Chimaphila. Powder.—Yellowish-green to olive-green; fragments of polygonalepidermal cells associated with broadly elliptical stomata, about in length, surrounded by 5 to 8 neighboring cells; cells of meso-phyll with chloroplastids and frequently irregular masses of a car-bohydrate; fragments of fibrovascular bundles having spiral tracheae,and narrow, strongly lignified sclerenchymatous fibers, frequentlyalso associated with crystal fibers having monoclinic prisms, to mm. in diameter; numerous fragments made up ofcells having a yellowish-brown content which are colored a bluish-black upon the addition of a freshly prepared solution of ferrous sul-phate. Constituents.—Two glucosides—arbutin and ericolin; a crystal-line, resinous principle, ursone; tannin about 5 per cent; gallic acid; UVA-UESI 507. Fig. 215.—Arctostaphylos Uva-Ursi. A, transverse section of part of the stem:C, cells of cortex; St, pericycle composed of sclerenchymatous fibers; L,leptome; H, tracheae; Mp, a medullary ray. B, transverse section of petiole;Coll, collenchyma; P, large elliptical plates of parenchyma containing chloro-plasts; L, leptome; H, hadrome or woody portion of the bundle. C, trans-verse section of leaf: Ed, dorsal or lower epidermis; P, loose mesophyll, thecells of which, near the epidermis are palisade-like and toward the center ofthe blade are more nearly isodiametric. D, transverse section of ventralportion of midrib: Ep, epidermal cells; P, cells containing chloroplasts;Coll, collenchyma; St, stereome; H, hadrome-parenchyma. E, transversesection of dorsal portion of midrib: L, portion of leptome; the o
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
