Which plant is referred to scientifically as Forsythia x intermedia?

Forsythia x intermedia is commonly known as Border Forsythia. This plant is a hybrid that combines traits from different species of forsythia, primarily Forsythia suspensa and Forsythia viridissima. It is well-regarded for its bright yellow flowers that bloom in early spring, often before the leaves emerge, making it a popular choice for ornamental landscaping.

The other options represent distinct types of plants with different scientific classifications and characteristics. Oakleaf Hydrangea, Hybrid Witchhazel, and Bigleaf Hydrangea correspond to different genera and species, each with unique floral and foliage attributes. Hence, identifying the correct plant based on its scientific name aligns with recognizing Dawn Forsythia as a specific and well-known variety in the forsythia family.