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 . of centralcylinder (I), the endodermis (e), a pericambial layer (i). The central cylinderconsists of six to eight radial fibrovascular bundles, and some of the tracheaecontain a brown gummy substance. B, transverse section of rhizomeshowing epidermis (t), the outer wall of which contains a yellowish-brownsubstance, parenchyma (p) of cortex containing starch, sieve of cortex (s),cambium (c), tracheae (t), trac
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 . of centralcylinder (I), the endodermis (e), a pericambial layer (i). The central cylinderconsists of six to eight radial fibrovascular bundles, and some of the tracheaecontain a brown gummy substance. B, transverse section of rhizomeshowing epidermis (t), the outer wall of which contains a yellowish-brownsubstance, parenchyma (p) of cortex containing starch, sieve of cortex (s),cambium (c), tracheae (t), tracheae (r) containing globular or somewhatirregular yellowish-brown masses, tracheids (h), internal sieve groups (s),parenchyma of pith {p) containing starch. C, longitudinal section of thewoody part of the rhizome. D, isolated starch grains, which are from mm. in diameter. 530 SCIENTIFIC AND APPLIED PHARMACOGNOSY Powder.—Grayish-brown; starch grains spheroidal or slightlypolygonal, from to mm. in diameter; fragments con-taining lignified tracheae and tracheids conspicuous; fragments oftracheae with spiral thickenings relatively few; bast fibers few, very. Fig. 226.—A, transverse section of the root of Spigelia marilandica: a, epidermis; b, cortex; d, xylem; e, cambium; i, pith; j, endodermis; I, pericycle B,transverse section of the root of Ruellia ciliosa: a, epidermis; b, cortex; c, bast fibers; d, xylem; j, endodermis; I, pericycle; m, cystoliths; n, collen-chyma; o, sclereids or elongated stone cells.—After Stockberger. long, non-lignified; occasional fragments of the reddish-brownepidermal cells. Constituents.—A crystalline, volatile alkaloid, spigeline, whichsomewhat resembles confine and nicotine and which forms precipi- RUELLIA 531 tates with iodin or Mayers reagent that are soluble in mineral acids;a bitter, acrid principle; volatile oil; resin; tannin; and starch. Ruellia.—For a number of years true Spigelia has been sub-stituted by
Size: 1305px × 1914px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
