1. relating to or forming an involucre (a whorl of bracts surrounding a flower head or inflorescence)
Usage: botanical

Examples

• The involucral bracts protect the developing flower buds.
• Botanists examined the involucral structures of the daisy family.
• The involucral leaves were arranged in a distinctive pattern.
• Each involucral bract had a pointed tip.
• The involucral whorl consisted of twelve green bracts.