Possible Clues:

• Flower, say — one in group appearing nightly
• Showy flower, also known as columbine
• Flowering plant for example, one in Abruzzi capital
• I twice must wrap limb in water plant
• Plant also known as columbine and granny's bonnet
• Columbine’s one limb I clad in pale blue
• Plant, say, found on island? Eagle circles round it
• One member - one in water - is Columbine