The carcerulus is typical of the Lamiaceae family, e.g. deadnettle (Lamium).

薄荷类（唇形科）植物的典型特征。

The resemblance of families such as the Verbenaceae and Labiate is the result of evolutionary convergence .

科的相似性，如马鞭草科与唇形科的相似性，化上的趋同造成的。