New Flora of the British Isles (Fourth ed.). Greensboro, North Carolina: National Plant Data Team. It is avoided by livestock when fresh, but when the plant dries the toxin is lost, so hay containing the plant is safe for animal consumption. This plant, like other buttercups, contains the toxic glycoside ranunculin. Other names for the bulbous buttercup are "Goldcup" because of the colour and shape of the leaves, and "Frogs-foot" from their form. Īlthough 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. After the plant dies in heat of summer, the corm survives underground through the winter. 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. Although it doesn't generally grow in proper crops or improved grassland, it is often found in hay fields and in coastal grassland. īulbous buttercup grows in lawns, pastures and fields in general, preferring nutrient-poor, well-drained soils. It grows in both the eastern and western parts of North America as an introduced weed. The native range of Ranunculus bulbosus is Western Europe between about 60°N and the Northern Mediterranean coast. The flowers are glossy yellow and 1.5–3 cm wide. The flower forms at the apex of the stems, with 5–7 petals, the sepals strongly reflexed. : 120 There are alternate and sessile leaves on the stem. The stems are 20–40 cm tall, erect, branching, and slightly hairy, with a swollen corm-like base. It has bright yellow flowers, and deeply divided, three-lobed long-petioled basal leaves.ĭescription The “bulb” of the bulbous buttercup Anthony's turnip, is a perennial flowering plant in the buttercup family Ranunculaceae. Ranunculus bulbosus, commonly known as bulbous buttercup or St.
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