Practice question
Question
Diadelphous stamens are characteristic of
Explanation
Diadelphous staminal arrangement with filaments fused into two groups (9)+1 defines papilionaceous Fabaceae including Pisum sativum cultivated pea. Free dorsal filament allows nectar access at base while united sheath encloses ovary protecting from excessive pollen robbing and desiccation. China rose forms monadelphous column enclosing style completely, sunflower syngenesious anther tube surrounding style, mustard polyandrous tetradynamous free in two lengths 4+2. Developmental basis involves intercalary congenital fusion of filament primordia but anthers remain distinct apically, contributing to functional keel pollination biology and precise pollen dispensing mechanism characteristic of legume family.
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