To provide an accurate answer regarding the type of line used in floral designs on a vase, it would be helpful to know more context about the specific vase or design you are referring to. In general, floral designs on vases can be created using various types of lines, such as:
- Curved Lines: Often used to represent natural forms like flower petals and stems, giving a sense of flow and organic shape.
- Straight Lines: Can be used in geometric floral designs or to create structure in the arrangement.
- Spiral Lines: Commonly found in designs representing vines or swirling floral arrangements.
Please provide more details about the vase in question for a more focused response!