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Genus Aristolochia Family Aristolochiaceae

Synonyms: Pararistolochia APNI*

Description: Woody climbers or slender vines with young branches ± glabrous to rusty-pubescent.

Leaves sometimes 3-veined from base, fine venation conspicuous, raised on both surfaces; petiole thickened and twisted, with base expanded into a horizontal ridge extending around the stem; pseudo-stipules absent or sometimes present.

Flowers borne on leafy shoots. Tubular calyx irregular with a single lobe or long lip, or 2-lipped with a broad standard and long keel. Anthers up to 6. Stigmatic lobes up to 6.

Capsule dehiscent, usually dehiscing upwards from the base of the pedicel; seeds numerous, cordate, flattened.


Distribution and occurrence: World: c. 120 spp., trop. & temp. regions. Aust.: 10 sp. (3 naturalized), Qld, N.S.W., N.T., W.A.

Text by G. J. Harden
Taxon concept:

Taxa not yet included in identification key
Aristolochia meridionalis

 Key to the species 
1Fruit dehiscent, short; perianth irregular with a single lobe (long lip), or 2-lipped with a broad standard and long keel; stigmatic lobes up to 6; anthers up to 6; flowers borne on leafy shootsAristolochia elegans
Fruit indehiscent, elongate, strongly ribbed; perianth regularly 3-lobed or irregular with 1 or 3 long tails from the mouth of the limb; stigmatic lobes 6–12; anthers 6–24; flowers mostly on the old wood2
2Leaves mostly 10–20 cm long, ovate to elliptic, base cordate or rounded, brown hairs scattered on veins on lower surfaceAristolochia praevenosa
Leaves usually 5–10 cm long, lanceolate to narrow-elliptic, base ± truncate to slightly cordate, glabrous
                       Back to 1
Aristolochia laheyana

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