These are growing on a vine that dies back to the ground every year. The host plant is a spirea. The florescense is similar to a pitcher plant, & sometimes they have bugs inside of them. But there is not a lid which closes. Leaves are slightly heart-shaped.
thanks to Kevin Topak for identifying this......
Dutchman's Pipe, Broadleafed Birthwort
Genus: Aristolochia (a-ris-toh-LOH-kee-uh)
Species: macrophylla (mak-roh-FIL-uh)
Synonym: Aristolochia durior
Synonym: Aristolochia maurophylla
20-30 ft. (6-9 m)
Sun to Partial Shade
Parts of plant are poisonous if ingested
By dividing the rootball From woody stem cuttings From seed; direct sow outdoors in fall
The Aristolochiales are a group of paleoherbs , a basal group of flowering plants . There are about 600 to 700 species, most of them in the genus Aristolochia (ca. 500 spp.), and most of the rest in Asarum (ca. 100 spp.).
The majority of the Aristolochiales are tropical, though a number of them range as far north as Canada, Scandinavia, and northern Japan. They may grow as climbing vines, as short creeping herbs, and a few are shrub-like.
A. macrophylla is generally grown for its ability to grow fast, climb, and create shade or privacy to an area. It dies down each winter and returns in spring. The leaves are heart-shaped with a rough texture. The flowers are insignifcant, a brownish and cream color, and resemble a Meerschaum pipe. They have a strange, but not unpleasant odor and are attractive to the Pipe Vine Swallow. This plant can grow up to 18 inches per year, and a strong trellis is needed.
WARNING Member of the genus Aristolochia are also called birthworts and are occasionally encountered in herbal preparations as a remedy for various ailments as well as to ease the pain of childbirth. They were sometimes used to treat malaria and other diseases. Many Aristolochias contain the alkaloid aristolochic acid and other components. All of these plants are highly toxic, especially to the kidneys. Avoid herbal supplements containing members of this genus. Incorrect doses can cause vomiting, pain and even death.
Introduction to the Aristolochiales Birthworts and Dutchman's pipes