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Arctic sweet coltsfoot

Petasites frigidus

Also called Sweet Coltsfoot, Arctic Butterbur, Northern Sweet Coltsfoot

Arctic sweet coltsfoot
Photo: Walter Siegmund (talk), CC BY-SA 3.0

Arctic sweet coltsfoot is a hardy perennial of the daisy family that grows from an underground rootstock, producing flower stems in early spring and large leaves through summer. It thrives in cool, moist, shaded ground such as stream banks.

Family
Asteraceae (Daisy family)
Grows as
Perennial
Light
Part shade, Shade
Water
Keep the soil consistently moist, as it prefers seeping ground and stream banks.
Soil
Moist, humus-rich soil.
Temperature
Tolerates subarctic cold well; suited to cool temperate and subarctic climates, and it will struggle in hot summers.
How easy
Moderate
Safety
Toxic: The plant is likely to contain toxic pyrrolizidine alkaloids, which can damage the liver over time with repeated consumption.
Native range
Subarctic to NW. U.S.A.
Climate
subalpine or subarctic

About

Petasites frigidus, the Arctic sweet coltsfoot or Arctic butterbur, is a species of flowering plant in the family Asteraceae. It is native to Arctic to cool temperate regions of the Northern Hemisphere in northern Europe, northern Asia and northern North America.

It is a herbaceous perennial plant producing flowering stems in early spring, and large leaves through the summer. The upright flowering stems are 10–20 cm (4–8 in) tall, and bear only 5–12 inflorescences, yellowish-white to pink in colour. The leaves are rounded, 15–20 cm (6–8 in) broad, with a deeply cleft base and shallowly lobed margin, and rise directly from the underground rootstock. The underside of the leaves is covered with matted, woolly fuzz. It grows in moist shaded ground, preferring stream banks and seeping ground of cut-banks.

Uses

The leaf stalks and flower stems (with flowers) are edible, and can be used as a vegetable dish. A salt-substitute can also be made by drying and then burning the leaves. This black, powdery substance will provide a salty taste. However, given the high likelihood of the presence of toxic unsaturated, diester pyrrolizidine alkaloids in this species, consumption should be very limited.

Other Petasites plants

White Butterbur · Common Butterbur · Japanese sweet coltsfoot · Winter Heliotrope · Petasites spurius · Butterbur

Text excerpted from the Wikipedia article Petasites frigidus 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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