Petrea are commonly known as Queen's Wreath, Sandpaper Vine, Purple Wreath, Blue Bird Vine. Petrea Volubilis is one of the most distinct and beautiful in climbers. It is a fast-growing semi-shrub and semi-climber with star-like flowers. It grows best in the sunshine. It flowers in spring and in some areas also in November. The flowers come in raceme reaching over 1 foot long. The true flower, which is purple, lasts a couple of days but the blue bracts remain much longer, slowly turning gray.