1. Gross Anatomical study of Crude Drugs
Datura Leaf

2. Gross Anatomical study of Crude Drugs
Datura Leaf

3. Objectives On completion of this period you would be able to know the
Biological source
Histology
Constituents and
Uses of Datura

4. Can You Identify this Plant?
Fig:1

5. 1. Can we use this plant as medicinal plant?
Ans: Yes/ No
2. Which part of the plant is used as a medicinal agent?
Ans: Flowering tops and leaves
3. How do you confirm that this plant is Datura?
Ans: By leaves , flowers and fruits
4. Are there any other methods to confirm the genuinity of
crude drug?
Ans: Yes . By histological study

6. Biological source : Dried leaves and flowering tops of
Datura
Biological source : Dried leaves and flowering tops of
Datura metel
Family : Solanaceae

8. A transverse section of Datura leaf shows
Upper Epidermis
Mesophyll
Lower Epidermis
Fig :3

9. Lamina : Dorsiventral Upper Epidermis : Straight walls
600 to 1100 cells/ sq.mm
Single layered
rectangular
Fig :4

10. Cruciferous or anisocytic (unequal celled)
Stomata :
Cruciferous or anisocytic
(unequal celled)
Fig :5

11. Covering Trichomes Trichomes : Uniseriate Multicellular Warty
Blunt tip
Glandular Trichomes
Unicellular stalk
Head 2-4 celled
Fig : 6

12. Mesophyll Palisade : Single layered compact cells radially elongated
covering 2/5 th of the lamina
Fig : 7

13. Spongy Parenchyma 6 – 8 layers Loosely arranged intercellular spaces
cluster crystals
Microspheroidal crystals
Vascular strands
Fig : 8

14. Wavy walls 700 – 1250 cells / sq.mm
Lower Epidermis :
Cuticle
Wavy walls 700 – 1250 cells / sq.mm
Single layered
Rectangular
Stomata
Numerous trichomes
Fig : 9

15. presence of Collenchyma at
Midrib
Continuous
epidermal cells &
presence of Collenchyma at
below upper
epidermis
above lower
having thick walled
cellulosic cells
Fig : 10

16. Cortical Parenchyma contains
Prisms of calcium oxalate
Microsphenoidal crystals
Vascular Bundle
Xylem : Lignified
Phloem: Non-lignified
Fig : 11

17. Chemical constituents
Tropane Alkaloids namely
Scopolamine (hyoscine)
Hyocyamine
Atropine

18. Gastric and duodenal ulcers
Uses
Parasympatholytic
CNS depressant
Mydriatic
Antispasmodic
Gastric and duodenal ulcers

19. QUIZ 1. Which type of stomata present in Datura?
Ans: Cruciferous or Anisocytic stomata
2. Whether the palisade parenchyma continuously arranged or not ?
Ans: Yes
3. What type of trichomes are present in Datura leaf?
Ans: Covering & glandular trichomes
4. Collenchyma is present at & region
Ans: Below upper & above lower epidermis

20. Questions 1. Describe in detail about the histology of Datura leaf
with a neat labelled diagram.
2. Write the Botanical source, family, constituents and
uses of Datura leaf

21. Thank you