Floating marsh marigold

Caltha natans

Physical Characteristics

Caltha natans is a PERENNIAL growing to 0.3 m (1ft). See above for USDA hardiness. It is hardy to UK zone 2. It is in flower from May to June. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, beetles, flies. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay soil. Suitable pH: mildly acid and neutral soils. It can grow in semi-shade (light woodland) or no shade. It prefers wet soil and can grow in water.

Distribution

North-western N. America - Alaska to Canada. E. Asia - N. China, Mongolia, Siberia.

Habitats

Pond; Bog Garden;

Edible Uses

Edible Parts: Flowers Leaves Root Edible Uses: Root - cooked. A survival food, used when all else fails[172]. Some caution is advised, see the notes above on toxicity. Flower buds - cooked. Added to stews etc or pickled as capers[172]. Some caution is advised, see the notes above on toxicity. Young leaves - cooked. Best before the plant flowers[172]. Some caution is advised, see the notes above on toxicity.

Medicinal Uses

Antispasmodic Expectorant Warts Used in the treatment of sore throats[174].

Known Hazards

The whole plant, but especially the older portions, contains the toxic glycoside protoanemanin - this is destroyed by heat[172]. The sap can irritate sensitive skin[172].