Class XII Practical: Taxonomy - Floral Characteristics, Diagram & Formula

Objective

To study the floral characteristics, construct the floral diagram, and write the floral formula for a representative plant from a given family.

Guidelines

Specimen Selection: Choose a fresh flower from one of the specified families (Malvaceae, Leguminosae - Papilionaceae, Solanaceae, Liliaceae/Amaryllidaceae, Cruciferae, Compositae, Gramineae).
External Morphology: Observe and note down external features:
- Type of inflorescence.
- Bracteate/Ebracteate, Bracteolate/Ebracteolate.
- Pedicellate/Sessile.
- Symmetry (Actinomorphic/Zygomorphic).
- Sexuality (Unisexual/Bisexual).
Dissection & Counting: Carefully dissect the flower and count the number of parts in each whorl:
- Calyx: Sepals (number, aestivation, fusion).
- Corolla: Petals (number, aestivation, fusion).
- Androecium: Stamens (number, arrangement, fusion, anther attachment).
- Gynoecium: Carpels (number, fusion, ovary position, placentation).
Floral Diagram: Draw a floral diagram representing the arrangement of floral parts in concentric circles, their relative positions, and fusion.
Floral Formula: Write the floral formula using standard symbols to represent symmetry, sexuality, and the number and fusion of parts in each whorl.

Expected Outcome

Ability to systematically analyze a flower, represent its structure through a floral diagram, and summarize its characteristics using a floral formula.

Class XII Practical: Taxonomy - Floral Characteristics, Diagram & Formula

Objective

To study the floral characteristics, construct the floral diagram, and write the floral formula for a representative plant from a given family.

Guidelines

Specimen Selection: Choose a fresh flower from one of the specified families (Malvaceae, Leguminosae - Papilionaceae, Solanaceae, Liliaceae/Amaryllidaceae, Cruciferae, Compositae, Gramineae).
External Morphology: Observe and note down external features:
- Type of inflorescence.
- Bracteate/Ebracteate, Bracteolate/Ebracteolate.
- Pedicellate/Sessile.
- Symmetry (Actinomorphic/Zygomorphic).
- Sexuality (Unisexual/Bisexual).
Dissection & Counting: Carefully dissect the flower and count the number of parts in each whorl:
- Calyx: Sepals (number, aestivation, fusion).
- Corolla: Petals (number, aestivation, fusion).
- Androecium: Stamens (number, arrangement, fusion, anther attachment).
- Gynoecium: Carpels (number, fusion, ovary position, placentation).
Floral Diagram: Draw a floral diagram representing the arrangement of floral parts in concentric circles, their relative positions, and fusion.
Floral Formula: Write the floral formula using standard symbols to represent symmetry, sexuality, and the number and fusion of parts in each whorl.

Expected Outcome

Ability to systematically analyze a flower, represent its structure through a floral diagram, and summarize its characteristics using a floral formula.

Practical Guideline - Floral Taxonomy

Class XII Practical: Taxonomy - Floral Characteristics, Diagram & Formula

Objective

Guidelines

Expected Outcome

On this page

Practical Guideline - Floral Taxonomy

Class XII Practical: Taxonomy - Floral Characteristics, Diagram & Formula

Objective

Guidelines

Expected Outcome

On this page