Ranunculus
Ranunculus is a large genus of around 600 species in the buttercup family, Ranunculaceae, with a global distribution. The latin name means little frog, which is a reference to their preferance to moist soil. Most flower in spring or early summer, usually yellow flowers, but a few flower white or greenish flowers. They prefer sunny positions.
Ranunculus repens 'Pleniflorus'
Creeping buttercup is a noxious weed that can be extremely difficult to eradicate from a garden. 'Pleniflorus' is a better behaved garden variety with double, yellow flowers with a green center.
Large white buttercup is a tall perennial with white flowers.
Ranunculus parnassifolius
A low-growing rock garden plant with glossy, dark green foliage and white flowers.
Snowy-flowered crowfoot is a low-growing perennial with white flowers.
Alpine buttercup is a rock garden plant with white flowers.
Ranunculus acris 'Flore Pleno'
Meadow buttercup is a common meadow flower in Iceland and large areas of Eurasia with yellow flowers in early summer. 'Flore Pleno' is a garden variety with double, golden yellow flowers.
Ranunculus aconitifolius 'Flore Pleno'
White bachelor buttons is a medium sized perennial with double, white flowers.