John,
That is so much more exciting.
It is another plant I have failed with several times.
It needs summer heat, but not in the humidity of the tunnel.
All the named sub-divisions of the species have been 'sunk' back into the species.
In Ukraine it was only ever found wild in Crimea.
Was the subspecies biebersteiniana?
There is also a named 'pink' form [ tenufolia rosea ] with a particularly fine form of that being 'Kinlen'.
The forms named for leaflet width [brevifolia, laciniata, latifolia etc], are now all thought to fall within 'the range' of the species and at best are 'forms', but from seed you get a range of leaf shapes. I have kept them alive long enough to see leaves!
Please post again with flowers open.
I'm vicariously excited.
Chad
ps.
A good introduction is
here.