Petrea racemosa - Royal Queen's wreath, Sandpaper vine with larger flowers than P. volubilis. A twining vine with rough green leaves and spectacular tall clusters of purple flowers. It likes warm and humid conditions. The flowers come in raceme reaching over 1 foot long, the flowers lasts a couple of days but the blue calices remain much longer, slowly turning gray. See picture of actual plant for sale (1-2013).