Question

Microscopic examination of leaves of which of the following plant shows the presence of cystolithic and glandular hair ?

• A. Digitalis purpurea
• B. Cannabis sativa
• C. Papaver somniferum
• D. Nicotiana tabacum

Hint:

Cannabis leaf → cystolithic hairs + glandular trichomes (key forensic ID feature).

Answer 1

The Correct Option is B

Concept: Microscopic identification of plant materials in forensic botany relies on characteristic anatomical features such as trichomes (hairs) and specialized cells.

Step 1: Understanding cystolithic hairs.
Cystolithic hairs contain deposits of calcium carbonate (cystoliths) and are diagnostic features in certain plants.

Step 2: Understanding glandular hairs.
Glandular hairs secrete substances such as resins or oils and are also important identifying features.

Step 3: Evaluating options.

• Digitalis purpurea → Does not show cystolithic hairs prominently

• Cannabis sativa → Shows both cystolithic hairs and glandular trichomes (resin-secreting)

• Papaver somniferum → Lacks such characteristic combination

• Nicotiana tabacum → Has glandular hairs but not cystolithic hairs

Step 4: Final evaluation.
Cannabis sativa uniquely shows both features. Final Conclusion:
Hence, the correct answer is option (2).