Scientific name: Aristolochia rotunda L.
With an underground tuber.
Stems to 60cm; petioles absent or very short, much shorter than pedicel.
Flowers 2.5-5cm, with perianth-tube less than 5mm wide at base, with dark brown lobe, 1 in each leaf-axil.
Chromosome number: 2n=14.
Introduced-naturalized; on chalky slopes.
This species is keyed out on Page 667 of the Text Key.
Surrey since at least 1918 (and formerly Kent); South Europe.
Aristolochia rotunda L.
Aristolochia rotunda (Smearwort)
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