verbena bonariensis argentinian vervain or purpletop vervain, clustertop vervain, tall verbena, pretty verbena, purple flower,

argentinian background beautiful beauty bloom blooming blossom bonariensis botanical botany chiang chiangmai closeup clustertop color colorful detail field flora floral flower flowers fresh garden gardening green growth jam landscape leaf macro mae mai mon natural nature park petal plant pretty purple purpletop rim season small spring summer tall thailand travel verbena vervain violet