Seeds from this Aristolochia sprucei. Rare Aristolochia of the family Aristolochiaceae. Is a large plant genus with over 500 species. Collectively known as birthworts, pipevines or Dutchman’s pipes,. They are widespread and occur in the most diverse climates. Aristolochia is a genus of evergreen and deciduous woody vines and herbaceous perennials. The smooth stem is erect or somewhat twining. The simple leaves are alternate and cordate membranous, growing on leaf stalks. The flowers grow in the leaf axils. They are inflated and globose at the base, continuing as a long perianth tube, ending in a tongue-shaped, brightly colored lobe. These flowers have a specialized pollination mechanism. The plants are aromatic and their strong scent attracts insects. The inner part of the perianth tube is covered with hairs, acting as a fly-trap. These hairs then wither to release the fly, covered with pollen. most all tropical plants, all parts of this plant are poisonous. Zones 10-11.