Scheme for description of Cinchona Bark First year practical course (Botany 1)

1. Scheme for description of
Cinchona Bark
First year practical course
(Botany 1)
Presented by:Presented by:
Shimaa Abdelgawad
Assisting lecturer at
Pharmacognosy department,
Faculty of pharmacy,
Fayoum University

2. Name: Cinchona Bark, ‫ا‬
Origin: the dried stem and root barks of:
Cinchona succirubra known as red
Cinchona,
C. ledgeriana, C. Calisaya known as yellow
Cinchona,
C. ledgeriana, C. Calisaya known as yellow
Cinchona,
C. officinalis known as pale Cinchona
Family Rubiaceae
Condition: dry, broken

3. Name: Cinchona Bark, ‫ا‬
Origin: the dried stem and root barks of:
Cinchona succirubra known as red
Cinchona,
C. ledgeriana, C. Calisaya known as yellow
Cinchona,
C. ledgeriana, C. Calisaya known as yellow
Cinchona,
C. officinalis known as pale Cinchona
Family Rubiaceae
Condition: dry, broken

4. T.S. in Cinchona bark
secretion canals
Cork
Cortex
Phloem fiber
1. Cork: 5-8 layers of thin
walled flattened cells
with reddish brown
content (cinchotannic
acid).
2. Cortex: Thin wall
parenchyma cell contain
rounded starch granules,
micro prisms of calicumPhloem fiber
M.R
micro prisms of calicum
oxalate, secretion canals
(laticeferous cells) which
secretes latex and
tannins appear oval in
T.S.
3. Phloem: Characterized by phloem fibers.
- Description of fiber: Fusiform lignified fiber having striated walls and funnel shaped pits.
- Phloem parenchyma: Thin walled parenchyma with scattered ca oxalate prisms.

6. Powder of Cinchona
Idioblast
Fragments of cork cells starch
Idioblast
(microprisms of ca oxalate)

7. Phloem fiber
Phloem parenchyma
+ medullary rays
- Description of fiber: fusiform lignified fiber having striated walls and funnel shaped pits.

8. Chemical tests of Cinchona
•• ForFor cinchonacinchona: on heating 0.5 gram powder in dry test
tube, purplish red or carmine red fumes which
condense as purplish red drops soluble in alcohol give
solution with blue florescence
•• GeneralGeneral testtest forfor alkaloidalkaloid: shake 0.1g powder with
2ml HCl filter, filtrate + mayer’s reagent, yellowish
white ppt:
• Speciall testtest forfor quininequinine alkaloidalkaloid::
Powder alcoholic extracts is mixed with dilute HPowder alcoholic extracts is mixed with dilute H22SOSO44 ;;
blue fluorescence is observedblue fluorescence is observed