Name two flowers, each with joined and separated sepals.

Joined Sepals: Rose (Rosa spp.)
The sepals of a rose flower are typically joined at the base, forming a cup-like structure known as the calyx. The calyx provides protection to the petals in the bud stage and supports the overall structure of the flower.

Separated Sepals: Lily (Lilium spp.)
In lily flowers, the sepals are usually separate from each other and form individual, distinct segments surrounding the petals. This arrangement allows the petals to open up more prominently and showcase the inner parts of the flower.

Remember, flower structures can vary among different species within the same genus and even among individual flowers, so there might be some variation in the arrangement of sepals.