Arum is a genus of rhizomatous perennial plants in the Araceae family, native to Europe, North Africa and western and central Asia, with the most species in the Mediterranean. Growers mainly care for hardy woodland species, which need a cool, shaded, moist spot and a rest period in summer.
Family
Araceae (Arum family)
Grows as
Perennial
Light
Part shade, Shade
Water
Keep soil moist during the growing season and let it dry out while the plant is dormant in summer.
Soil
Humus-rich, well-drained garden soil or leaf mould.
Temperature
Hardy in cool temperate climates; dormant in hot summers.
How easy
Easy
Safety
Toxic: All parts contain irritant calcium oxalate raphides and unverified proteinaceous toxins, which can cause burning and swelling of the mouth and throat if chewed.
About
Arum is a genus of flowering plants in the family Araceae. They are native to Europe, northern Africa, and western and central Asia, with the highest species diversity in the Mediterranean region. Frequently called arum lilies, they are not closely related to the true lilies Lilium. Plants in the closely related genus Zantedeschia are also called 'arum lilies'.
They are rhizomatous, herbaceous perennial plants growing to 20–60 cm (7.9–23.6 in) tall, with sagittate (arrowhead-shaped) leaves 10–55 cm (3.9–21.7 in) long. The flowers are produced in a spadix, surrounded by a 10–40 cm (3.9–15.7 in) long, distinctively coloured spathe, which may be white, yellow, brown, or purple. Some species are scented, others not. The fruit is a cluster of bright orange or red berries.
Where it grows
Distribution maps for all species were published in a 2010 paper.
Uses
Despite the presence of irritant raphides, which act together with unverified proteinaceous toxins, most parts of all species have been used as food, and continue to be used today. Use is uncommon because of the duration required to reduce aroid raphides to safe levels.
Text excerpted from the Wikipedia article Arum 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.