Wedgewood hasn't kept all its patterns. My great-grandmother's Wedgewood is "Conway". That pattern was discontinued over 50 years ago.
You CAN get replacement plates and whatnot at some of the china outlets, and only the dinner plates, soup dishes, and salad plates have the floral decal that distinguishes the pattern. The base pattern is "Edme" which is probably Wedgewood's most common pattern and has always been available, so no problem replacing teacups, saucers, etc.