Scientific and applied pharmacognosy : intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for fook and drug analysts and pharmacologists / by Henry Kraemer ... Illustrated with over 300 plates comprising about 1000 figures.

  • Kraemer, Henry, 1868-1924.
Date:
1920
Catalogue details

Licence: In copyright

Credit: Scientific and applied pharmacognosy : intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for fook and drug analysts and pharmacologists / by Henry Kraemer ... Illustrated with over 300 plates comprising about 1000 figures. Source: Wellcome Collection.

    117/786 (page 81)
    Inner Structure.—See Figs. 30, 31. Also Meyer, Arch, der Pharm., 1882, p. 80. Powder.—Grayish-brown to dark brown; strongly sternutatory; starch grains numerous, from 0.003 to 0.020 mm. in diameter, spher- oidal or ellipsoidal, single or 2- to 3-compound, the individual grains having a circular central cleft and often being swollen or otherwise more or less altered; calcium oxalate in raphides, from 0.015 to 0.150 mm. in length; fragments with tracheae, the walls being more or less strongly lignified and marked with scalariform or reticulate thicken- a* Fig. 30.—Cross-section of rhizome of Veratrum viride; a, section of a root near its origin; b, endodermis; c, one of the wavy fibrovascular bundles in the cortex; d, parenchyma; e, fibro vascular bundle of the central cylinder; /, parenchyma.—After Bastin. ings, frequently containing a lemon-yellow substance and associated with narrow, slightly lignified, porous, sclerenchymatous fibers; endodermal cells thickened on the inner tangential wall, occasional reddish-brown or brownish-black cork fragments. The powders of Veratrum album and Veratrum viride cannot be distinguished one from the other by their microscopic characters, but appear to differ chemically; a mount of V. viride in concentrated sulphuric acid gives a yellowish-red color and that of V. album a dull red color.