There are many different types of buttercup plants in the Ranunculus genus. There are perennials, annuals, biennials, and even aquatic and rock garden plants.

These buttercups have simple, yellow flowers with 5 to 10 petals. They are especially bright and glossy. This is because the petals curve inward and are constructed in such a way that they reflect light onto the flower center, thus increasing the heat. This warms the stamen, boosts their growth, and increases the chance of fertilization.
Also, this warmth attracts the pollinators. Buttercups are considered a source of food for bees and birds.