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 . rn Canada, and also found growing in Europe and Asia. Description.—In transversely curved pieces, occasionally in singlequills, from 1 to 10 cm. in length and 5 to 10 mm. in width; bark mm. in thickness; outer surface light grayish- to blackish-brown; irregularly wrinkled, somewhat scaly, frequently with finelongitudinal and transverse fissures, and numerous prominent brown-ish lenticels; inner surf
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 . rn Canada, and also found growing in Europe and Asia. Description.—In transversely curved pieces, occasionally in singlequills, from 1 to 10 cm. in length and 5 to 10 mm. in width; bark mm. in thickness; outer surface light grayish- to blackish-brown; irregularly wrinkled, somewhat scaly, frequently with finelongitudinal and transverse fissures, and numerous prominent brown-ish lenticels; inner surface light yellowish or reddish-brown, finelylongitudinally striate, fracture short, irregular; inner surface lightbrown, the middle bark marked by a light-yellow ring enclosing smallgroups of bast fibers; odor distinct, like valerianic acid; pleasantlybitter. Inner Structure.—See Fig. 288. 650 SCIENTIFIC AND APPLIED PHARMACOGNOSY Powder.—Light grayish-brown; calcium oxalate in rosetteaggregates from to mm. in diameter; starch grains to mm. in diameter, usually present in parenchyma andcells of medullary rays; fragments of parenchyma containing a A. Fig. 287.—Viburnum Prunifolium: A, transverse section of a part of the bark:K, cork; C, cells of primary cortex; St, stone cells, which are distributed notonly in the cortical area but in the strands of phloem between the medullaryrays; Br, rifts between the parenchyma cells, which in the inner portioncauses a layering of the bark; Ca, calcium oxalate usually occurring in theform of rosette aggregates; L, groups of sieve cells; P, parenchyma; M, amedullary ray. B, tangential section showing the bi-convex groups ofmedullary rays and surrounding tissues. C, fragments seen in the powdereddrug, the letters as in A.—Drawing by Haase. yellowish-brown amorphous substance; primary bast fibers occa-sional, having thick more or less undulate walls, which are slightlylignified, the ends being somewhat obtus
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
