Just put of curiosity, does it have Warzseviczianum in the background?
You certainely mean warczewiczianum/ warzcewiczii/ popowii/ humboldtii the darker form? Not warczewiczianum/ walllissii the pale form…
That section has been subject to many changes lately.
If you are talking about the darker form it is now named humboldtii…
Yes! It is a closely relative to exstaminodium some are even considering it as a variety.
Have a look at old thread on this forum about exstaminodium you will found some interesting discussions…