Chapter 5 — Morphology of Flowering Plants

Chapter 5 of the Class 11 Biology NCERT textbook, "Morphology of Flowering Plants", covers this topic. It describes the morphology of flowering plants, including roots, stems, leaves, flowers, fruits, and seeds, with their structural variations and adaptations.

• Vegetative body plan — The chapter maps the plant's above- and below-ground architecture—root systems that anchor and absorb, stems built of nodes and internodes that conduct and support, and leaves organized as base, petiole, and lamina for photosynthesis.
• The flower as a modified shoot — It explains the flower as a reproductive shoot with four whorls (calyx, corolla, androecium, gynoecium), whose symmetry and arrangement in inflorescences vary widely across flowering plants.
• Morphology as a classification tool — The chapter shows why these structural variations matter: recurring differences like reticulate versus parallel venation or one versus two cotyledons underpin how botanists identify and classify plants.

1. 01Root systems vary by plant type: dicots have tap roots (primary + lateral branches), monocots have fibrous roots (many roots from stem base), and some plants have adventitious roots from non-radicle parts
2. 02Stems are distinguished by nodes (where leaves attach) and internodes (portions between nodes); they bear buds and conduct water, minerals, and photosynthates
3. 03Leaves consist of leaf base, petiole, and lamina; venation patterns are reticulate (network) in dicots or parallel in monocots; leaves can be simple or compound (pinnate or palmate)
4. 04Flowers are modified shoots with four whorls: calyx (sepals), corolla (petals), androecium (stamens), and gynoecium (carpels); flower symmetry can be actinomorphic, zygomorphic, or asymmetric
5. 05Fruits develop from ripened ovaries after fertilization and contain seeds; the pericarp may be dry or fleshy (differentiated into epicarp, mesocarp, endocarp)
6. 06Seeds contain a seed coat and embryo with radicle, embryonal axis, and cotyledons; dicot seeds have two cotyledons while monocot seeds have one scutellum