Page 131 - Pharmacognosy-I (02-06-06-102)
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Cascara powder :
It is yellowish-brown to olive brown; with faint odour and persistent
bitter taste.
It is characterized microscopically by :
1- Numerous fragments of lignified bast fibres (phloem-fibres) in
groups, accompanied with crystal-sheath.
2- Sclereids in groups sometimes isolated, lignified with very narrow
lumen accompanied by crystal sheath.
3- Fragments of yellowish-brown cork cells with reddish brown content.
4- Numerous crystals of calcium oxalate, clusters and prisms.
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