The Gulf fritillary or passion butterfly (Agraulis vanillae) is a bright orange butterfly in the subfamily Heliconiinae of the family Nymphalidae.
The caterpillar food plants for gulf fritillaries are members of the genus Passiflora. The adult butterflies use nectar from many flowers, including Lantana plants. The Passiflora host plants are frequently called passion vines; in some Texan counties where this butterfly's population is high, gulf fritillaries will feed on specific species such as Passiflora lutea and Passiflora affinis.
