Buttercup

Where it grows

Meadow buttercup grows in damp grassland, lawns, and pasture across Europe, has naturalised across temperate North America, and is now common from Argentina to Tasmania. In British and Irish hayfields it is the most abundant yellow component of unimproved old meadow.

How to recognise it

An upright hairy perennial twenty to ninety centimetres tall with deeply lobed, palmate leaves and branching wiry stems. The five glossy petals reflect light because they contain a layer of air that acts as a mirror, an unusual optical structure shared with very few flowers. The bright disc of yellow stamens is unmistakable.

Garden & cultural uses

Buttercups are not deliberately planted but are tolerated in wildflower lawns. Livestock avoid eating them because the sap contains protoanemonin, which blisters the mouth and can irritate skin. Drying the hay breaks the compound down, making cut buttercup harmless in winter fodder.

In folklore

The childhood game of holding a buttercup under a friend’s chin to see if they “like butter” exploits the same glossy petal layer that produces the yellow gleam. The reflection works on any pale skin and proves nothing about anyone’s dairy preferences.