Dwarf Passionvine (Passiflora lutea) is an herbaceous vine that can grow approximately 20 feet high. Plant it in moist, well-drained soil. The showy, greenish-yellow to off-white flowers bloom summer to fall and are followed by small black berries. It is the larval host for the Gulf Fritillary, Julia and Zebra Longwing butterflies. It attracts birds, butterflies and the small black berries are harvested by birds and mammals.