Aristolochia gigantea

Aristolochia gigantea, the Brazilian Dutchman's pipe or giant pelican flower (syn. "Aristolochia sylvicola" ), is an ornamental plant native to Brazil. Typical of subtropical Bahia and Minas Gerais vegetation, it is a vigorous evergreen climber (vine) with heart-shaped leaves and spectacular fragrant flowers. This plant is cited in "Flora Brasiliensis" by Carl Friedrich Philipp von Martius. "A. gigantea" and other tropical Dutchman's pipe varieties pose a threat to the pipevine swallowtail butterfly. The butterfly confuses "A. gigantea" with its native host plant and will lay eggs on it although pipevine swallowtail caterpillars cannot survive on the foliage.
In cultivation in the UK - where it must be grown under glass - this plant has gained the Royal Horticultural Society’s Award of Garden Merit. It does not tolerate temperatures below . It can be grown from seeds or cuttings.