Aristochola durior (Dutchman’s Pipe) [synonym A. macrophylla]

An exceptionally vigorous vine, Dutchman’s Pipe (much to my surprise) is a temperate woodland plant that scale small buildings with ease. The purple-mahogany flowers are peculiar in appearance and release a faint odor.

Aristolocha durior (Dutchman’s Pipe) [synonym Aristolocha macrophylla]
Family: Aristolochiaceae
Subspecies: none
Native: moist woodlands in eastern United States
Hardiness Zones: 4-8 (thrives in greenhouses year-round)
Height: to 9 meters tall with proper objects to climb on
Diameter: to 6 meters wide at maturity
Root System: taproot, spreading, becoming very thick and woody
Growth Rate: very rapid
Age: perennial
Deciduous: yes
Monoecious/dioecious: monoecious (bisexual flowers)
Monocot/dicot: dicot

Tolerates: air pollution, pruning (very vigorous), most pests, fungal diseases and infections
Problems (major): none
Problems (minor): poorly tolerant of dry soils and droughts
Poisonous: no
Soil requirements: prefers consistently moist, deep, nutrient-rich, well-drained soils
Air requirements: tolerant of poor urban air quality
Watering requirement: moderate
Sun requirement: full sun or partial sun
Leaf shape: dark green (initially light) heart-shaped or rounded leaves, simple, alternate
Leaf size: to 30 centimeters in diameter, commonly overlap
Flower structure: very peculiar, small, cream, tubular section behind flat, mahogany-purple flower with a yellow-white, pubescent calyx (mouth-like entrance), to 5 centimeters in diameter
Flowering frequency: most in late spring or summer (May/June), may be year-round in greenhouses
Fruit type: capsule, green/brown, 4-10 centimeter
Fruit dispersal: small vertebrates (appreciates winter stratification for 3 months)
Epiphyte: vine, no
Notable characteristics:
The flowers are mostly flat at the receiving end while the interior, containing the sex organs, vaguely resemble a Dutch Pipe (hence the name).

Uses:
Pipe-vine Swallowtail Butterflies use this plant as a source of food in both portions of its life
Sources used:

Aristolochia_durior_3
Hanging flower at the Plant Biology greenhouse at Southern Illinois University Carbondale
unopened_flower
Flower (side view)
zA_durior
Foliage

All of the images provided were taken by me. They may be used for educational/informational purposes only, provided that this article/online journal is appropriately cited first.

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