Tall Bearded Iris "Wintry Twins" Iris flower-The word iris is Greek for 'rainbow'. The iris flower meaning are faith, wisdom, peace of mind, friendship and hope. Purple iris is symbolic of wisdom and compliments, yellow iris symbolizes passion, blue iris symbolizes hope and faith while white iris symbolizes purity. Irises may also express admiration and courage. February is a month of romance and iris is a fitting symbol.