Practice question

Two distinct fusion categories recognized in classical floral morphology influence taxonomic description and terminology in keys. Adnation signifies congenital cohesion between non-homologous organs belonging to different floral whorls, for instance epipetalous condition where stamens fused to petal tube common in Solanaceae and Lamiaceae improving floral tube stability, or epiphyllous stamens adnate to perianth in Liliaceae and Allium. Connation relates to union within same whorl like connate petals forming tubular corolla or syncarpous ovary. Understanding difference clarifies attachment patterns, floral evolution and outcrossing mechanisms.