Class IX Practical: Plant Life - Flower Study (Cross-Pollinated Flower)

Objective

To examine and identify the parts of a cross-pollinated flower, such as Hibiscus.

Guidelines

1. Specimen Selection: Obtain a fresh, large, and easily dissectible cross-pollinated flower (e.g., Hibiscus).
2. External Observation: Observe the overall structure, color, scent, and presence of nectar guides.
3. Identification of Floral Whorls: Identify and count the parts of each floral whorl:
   • Calyx: Sepals (number, fusion).
   • Corolla: Petals (number, fusion, arrangement).
   • Androecium: Stamens (number, arrangement, fusion, anther structure).
   • Gynoecium: Pistil/Carpels (stigma, style, ovary - note position and number of locules).
4. Dissection: Carefully dissect the flower to separate its parts. Observe the arrangement of stamens and pistil.
5. Drawing: Draw a neat, labeled diagram of the entire flower and its dissected parts.
6. Discussion: Relate the observed features to adaptations for cross-pollination (e.g., large petals, prominent stamens/pistil, nectar).

Expected Outcome

Ability to identify and label the different parts of a flower and understand their role in reproduction, particularly in the context of cross-pollination.