Standard
Standard refers to a variety of things, including Flandria Butterhead Lettuce, which is one of the standard glasshouse butterhead lettuce varieties for production from spring to autumn . Lettuce variety 42-156 RZ defines the bolting character of standard variety Flandria RZ . U.S. Fancy consists of heads of lettuce that meet similar varietal characteristics and are fresh . Lucrecia RZ is bigger than Flandria RZ and is used for weights .