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Smearwort

Aristolochia rotunda

Also called Round Leaved Birthwort, Smear Wort, Birthwort

Smearwort
Photo: User:Haplochromis, CC BY 2.5

Smearwort is a small herbaceous perennial from southern Europe that grows from a large tuber and produces unusual yellowish-green, foul-smelling flowers in spring. It is a wild plant rather than a common garden or houseplant, so the key is to give it a dry, sunny, well-drained spot that suits its Mediterranean origin.

Family
Aristolochiaceae (Aristolochi family)
Grows as
Bulb, Perennial
Light
Full sun, Part shade
Water
Water sparingly during active growth in spring and let the soil dry out fully once the plant dies back in summer.
Soil
Free-draining, gritty or sandy soil with some organic matter.
Temperature
Hardy in mild climates; protect the tuber from hard frost, roughly below -5 °C.
How easy
Moderate
Safety
Toxic: Aristolochia species contain aristolochic acids, which are toxic and can damage the kidneys if eaten; handle with care.
Native range
SC. & S. Europe
Climate
subtropical

About

Aristolochia rotunda, commonly known as smearwort or round-leaved birthwort, is a herbaceous perennial tuberous plant native to Southern Europe.

Where it grows

This plant is common in Mediterranean countries from Spain east to European Turkey. It is naturalised very locally in southern England.

Other Aristolochia plants

Indian birthwort · Aristolochia amara · Aristolochia argentina · Cairns Birdwing Butterfly Plant · Andalusian Dutchman's Pipe · Aristolochia boosii · Aristolochia bracteolata · Aristolochia cauliflora · Aristolochia ceropegioides · Aristolochia chalmersii · Aristolochia chilensis · Birthwort

Text excerpted from the Wikipedia article Aristolochia rotunda by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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