I.3 Examination of Plant Hairs (Trichomes)

Aim

To observe the structure and form of plant hairs (trichomes).

Specimen & Apparatus

• Leaf (e.g. tomato, geranium, or nettle)
• Forceps or needle
• Slide and coverslip
• Water
• Compound microscope

Method

1. Remove a small portion of the leaf bearing visible hairs.
2. Place directly on a slide in a drop of water.
3. Apply a coverslip gently.
4. Examine under low power to locate hairs.
5. Increase magnification to observe structure.

Observations to Make

• Shape and size of trichomes.
• Whether hairs are simple or branched.
• Distribution across the leaf surface.
• Any internal structure visible within the hairs.

⚠️ Safety: Please read the Safety & Disclaimer page before attempting this exercise.