Describing flowers that have petals united or fused together into a single structure; having a sympetalous corolla.
From Greek 'gamos' (fusion) + 'petalon' (petal) + '-ous' (having). Botanical terminology from 18th-19th century plant classification.
When petals fuse together like in morning glories or petunias, it creates a stronger structure that protects the flower's reproductive parts and makes pollination more efficient.
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