Biology Class 11 NCERT Solutions: Chapter 5 Morphology of Flowering Plants Part 3 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Q: 9. Take one flower each of families Fabaceae and Solanaceae and write its semi technical description. Also, draw their floral diagrams after studying them.


(1) Family Fabaceae/Papilionaceae (pea plant)

Fabaceae/Papilionaceae is a sub-family of the Leguminoseae family.

Vegetative Features:

Habit: Pinnately compound, alternately arranged with leaf tendrils with the pulvinus present at the leaf base along foliaceous stipules.

Root: Tap root system with root nodules.

Floral Features:

Inflorescence: Racemose, generally axial than terminal

Flower: Zygomorphic and bisexual flowers are found

Calyx: It contains five sepals, which are gamosepalous while aestivation is imbricate.

Corolla: It contains five petals (polypetalous) with vexillary aestivation. Androecium: It consists of ten anthers that are diadelphous with dithecous anthers. Gynoecium: Monocarpellary superior ovary which is unilocular with marginal placentation.

Fruit: Legume pod with non-endospermic seeds

Floral formula:

Economic importance: Peas are used as vegetables for making various culinary preparations.

Q_9_1_Flora Diagram of Family Solanaceae

(2) Flowers of Solanum nigrum

Family Solanaceae

Vegetative Features:

Habit: Erect, Herbaceous Plant

Leaves: Simple, exstipulate leaves with reticulate venation

Stem: Erect stem with numerous branches.

Floral Features:

Inflorescence: Solitary and axillary

Flowers: Actinomorphic, bisexual flowers

Calyx: Calyx is composed of five sepals that are united and persistent. Aestivation is valvate.

Corolla: Corolla consists of five united petals with valvate aestivation.

Androecium: It consists of five epipetalous stamens.

Gynoecium: It consists of bicarpellary syncarpous superior ovary with axile placentation.

Fruits: Berry

Seeds: Numerous, endospermous

Floral Formula:

Economic importance: Used for medicinal purposes

Q_9_2_Flora Diagram of Family Solanaceae

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