Aristolochia macrophylla Lam.
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Aristolochia macrophylla is a climber.
Aristolochia macrophylla was described by Jean-Baptiste Pierre Antoine de Monet de Lamarck in 1783. The name is considered as validly published.
Aristolochia macrophylla is a species in the genus Aristolochia which contains approximately 489 to 545 species and belongs to the family of the Aristolochiaceae (Birthwort Family). The type species of the genus is Aristolochia rotunda.
The climbers are comparatively fast-growing and reach heights of 8 to 10 metres. The plants reach a width of 2 to 6 metres.
Aristolochia macrophylla is deciduous. The dark-green, simple leaves are alternate. They are cordate and petiolate with entire margins and palmate venation. The surface of the leaves is puberulent. They turn an attractive yellow in autumn.
Flowers and Fruits
Aristolochia macrophylla produces solitary pendant, dark reddish brown tubular flowers from June to August. The plants flower on last years shoots. They are hermaphroditic.
The climbers carry green loculicidal capsules.
The plants form shallow roots.
Aristolochia macrophylla is native to the Southeast of the US.
The climbers prefer a half-shady to shady situation on moist soil. The substrate should be clay, sandy clay, loamy clay or peaty soil with a pH between 8 and 10. They tolerate temperatures down to -7Â°C (USDA zone 9).
The ornamental value of Aristolochia macrophylla lies especially in the ornamental leaves. Suited for pergolas, as well as suited as climbers in trees and as plant providing shelter for birds.
Maintenance and Propagation
The plants usually need very little maintenance.
Pests and Diseases
Honeydew, galls and distorted leaves are a sign for an infestation with aphids. Use an insecticide or control biologically , e.g. with parasitic wasps or predators such as Aphidoletes aphidimyza.
Sudden wilting and pale green discolouration indicate a fungal infection (phytophthora). Remove infected plants. Avoid by improving drainage and over-fertilization.
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
- Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.