Bedcovers are available to suit all types of decor, such as the following:

Modern contemporary: Sewn down corners with additional allowance for tuckunder which works well with slat-style bases.
Cap top: These look like a quilt cover - they are actually quilted top covers that hang just below the top mattress and work well alone or with blankets underneath.
Throwover bedspreads are a traditional style of bedcover fitted to the ground.