The eyes are the window of the soul.
The eye of a Primula flower is its center which may be colored different from the rest of the corolla and which is the mouth or end of the flower tube containing the stigma or anthers (see Style Position).
In Primula, whether the flower is annulate or exannulate is an important characteristic to differentiate between species.
|Close-up of the annulus in a Primula flower|
|Slice open a flower to determine annulate (L) vs exannulate (R).|
|Examples of annulate Primula flowers|
|Examples of exannulate Primula flowers|