5. Tea Leaves

Bot. origin: the dried leaves of Thea sinensis Linn. 

F: Theaceae           

Active constituent:

1.      Alkaloids (Methyl xanthenes):

a.     Caffeine

b.      Theobromine & Theophylline

2.     Tannins

Key element (microscopically examination):

1.     Anomocytic stomata.

2.     Cluster calcium oxalate.

3.     Branching sclereid.

Uses:

1.     CNS stimulant.

2.     Mild diuretic

3.     Weak smooth muscle relaxant.

4.     Anti diarrheic & astringent.

5.     Anti-cancer &anti-oxidant.

Test for identified:

Murexide test:                               

Aqueous decoction (10%)  residue +1ml conc HCl

   residue +vapors of NH3 → purple color   Disappearance of color.

         

Report in the lab.                                                              

Branching sclereid.

Cluster calcium oxalate

Anomocytic stomata

Chemical test                                      

Result	Test

Conclusion:………………………………………………………………………………………………