Aristolochia constricta seeds grow into a tropical climbing liana native to the wet tropical biome across a wide area of Tropical America — recorded from Colombia (Amazonia, Andes, Chocó, Pacific slopes) and the broader Neotropics. Described by Grisebach. The epithet constricta means 'constricted', referring to the narrowed throat of the characteristic pipe-shaped flowers that trap and temporarily detain pollinating insects inside the perianth tube. Used as a medicine across its range. IMPORTANT SAFETY NOTE: Like all Aristolochia species, this plant contains aristolochic acid, a proven carcinogen and nephrotoxin — do not ingest. Family Aristolochiaceae.Full sun to partial shade; moist, well-drained soils; warm wet tropical conditions. Vigorous liana requiring sturdy support. HOST PLANT for Neotropical swallowtail butterflies. 'Constricta' = constricted (narrowed throat of the pipe-shaped flower); Griseb. (Grisebach); medicine uses SAFETY: all Aristolochia contain aristolochic acid — carcinogen and nephrotoxin; do not ingest any part Tropical America (Colombia incl. Amazonia, Andean, Chocó, Pacific) — wet tropical biome; climber Genus Aristolochia: ~554 species; cosmopolitan; Dutchman's pipe vines; Family Aristolochiaceae; Order Piperales Full sun/partial shade; moist soils; warm tropical; strong support required; butterfly larval host; Aristolochiaceae Aristolochia constricta — named for the constricted tube of its pipe-shaped flowers — is a wide-ranging Neotropical liana of the wet tropics, its unusual floral architecture acting as an insect-trapping mechanism to ensure cross-pollination before releasing its visitors unharmed. IMPORTANT: Pictures show the adult plant, which is not for sale. The offer is only for seeds.