Page 245 - Pharmacognosy 2 PG303

Pharmacognosy-2 (PG303) Level 2 Clinical Pharmacy-Pharm D

Liquorice T.S; a, cork; b, cortex; c, Ceratenchyma; d, crystal sheath, e,
phloem fibers; f, sieve tubes; g cambium; h, xylem vessels; I, crystal sheath:
j, wood fibers; k, medullary rays; l, starch in cells.

Powder
Powdered Liquorice is light yellow in the peeled, or brownish-yellow or

purplish brown in the unpeeled, and characterized by:
1- The numerous fragments of fibers accompanied by crystal sheath and the
fibers are 8-25 µ, mostly 10-15 µ in diameter.
2- Dark yellow fragment of xylem vessels, 80-200 µ in diameter.
3- Prismatic crystals of calcium oxalate, free or in cells, 10-35 µ, mostly 15-25µ
long.
4- Numerous starch granules, free or in parenchyma cells, mostly simple, oval,
round or fusiform, with no striations but occasionally showing hilum, 2-20
µ, mostly about 10 .t in diameter.
5- Cork may be absent.

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