Lisianthus (Eustoma grandiflorum) 

lis·​i·​an·​thus

 

A tall, annual or biennial plant of the central and southern U.S. and Mexico that is related to the gentians, has usually pastel-colored, showy, roselike single or double flowers, and includes various cultivars grown in gardens and greenhouses for cut flowers

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Meaning

Lisianthus on the other hand comes from the Greek words 'lysis', which translates as 'dissolution', and 'anthos', meaning flower. ... As the lisianthus has its roots as a prairie flower, it is also suggested that it represents old-fashioned values and receptivity, calming thoughts and congeniality.