What kind of flower is the little flower in Undertale?

Most of the flowers raised by Dad Sheep are ranunculus, and the small flower is one of them, so the small flower should be "buttercup"

Buttercup (scientific name: Ranunculus japonicus Thunb.) is Ranunculus is a perennial herbaceous plant of the Ranunculaceae family. The fibrous roots are mostly clustered. The stem is upright, up to 70 cm high, the leaves are round-heart-shaped or pentagonal, the base is heart-shaped or truncate, the middle lobe is obovate-wedge-shaped or broadly oval-shaped or rhombus-shaped, with adnate pubescence on both sides, and the petiole is pubescent. The lobes are lanceolate, with canine teeth or divided again; the cymes have many flowers, scattered; the flowers are adnate pilose; the sepals are oval, white pilose; the petals are obovate-round, and the receptacle is short and hairless.