IGNOU LSE 13 2026 - Briefly explain the following terms and write the name of the family w

Question

Briefly explain the following terms and write the name of the family where the structure is found.

i) Diadelphous Stamens

ii) Phylloclade

iii) Verticillaster Inflorescence

iv) Protogynous flowers

v) Gynostegium

28 Jan 2026

Answer :

Word Count : 420

Diadelphous stamens refer to a condition in which the stamens of a flower are united by their filaments into two distinct groups, while the anthers remain free. This arrangement is typically seen in the family Fabaceae. In many legumes, such as *Pisum sativum* (pea), the diadelphous condition usually consists of nine stamens fused together to form a sheath around the ovary and one stamen remaining free, providing both structural support and efficient pollen transfer during pollination. This adaptation helps in precise pollen deposition on visiting pollinators. Phylloclade is a modified stem that assumes the functions of a leaf, primarily photosynthesis, and often resembles a leaf in shape and structure. True leaves in plants with phylloclades are usually reduced

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