Bulbous Buttercup

Appearance

The stems are 20–40 cm tall, erect, branching, and slightly hairy, with a swollen corm-like base.: 120  There are alternate and sessile leaves on the stem. The flower forms at the apex of the stems, with 5–7 petals, the sepals strongly reflexed. The flowers are glossy yellow and 1.5–3 cm wide. The plant blooms from April to July.

Naming

The bulbous buttercup gets its name from its distinctive perennating organ, a bulb-like swollen underground stem or corm, which is situated just below the soil surface. After the plant dies in heat of summer, the corm survives underground through the winter.
Although the presence of a corm distinguishes "Ranunculus bulbosus" from some other species of buttercup such as "Ranunculus acris", the species also has distinctive reflexed sepals.

Other names for the bulbous buttercup are "Goldcup" because of the colour and shape of the leaves, and "Frogs-foot" from their form.

Distribution

The native range of "Ranunculus bulbosus" is Western Europe between about 60°N and the Northern Mediterranean coast. It grows in both the eastern and western parts of North America as an introduced weed.
Bulbous buttercup grows in lawns, pastures and fields in general, preferring nutrient-poor, well-drained soils. Although it doesn't generally grow in proper crops or improved grassland, it is often found in hay fields and in coastal grassland.