赤い縁取のサツキ red bordered "Satuki azalea"

私はツツジとサツキの区別がつかないので、開花期の遅い方をサツキと判断しています。赤色の縁取りのあるサツキを見るのは始めてです。

I can't distinguish between "Tsutsuji azalea" and "Satuki azalea" so
I determine that late blooming flower is "Satuki azalea." This is the first time for me to see the petals of the "Satuki azaleas"bordered in red.
"Tsutsuji azalea" and "Satuki azalea" are not distinguished in English, both are simply expressed as "azalea".