Is it these two photos you are referring to Olivier?
The collector gave me this plant in 2009 under the name
S. tectorum . This is the first time it flowered.
Obviously, this is not
tectorum ! So, what is it? tectorum arachnoideum x or x montanum tectorum? An idea?
Lac de Chamole mt 2325 (Pila) AO,ET138,Italy
Maybe
@JungleShadows can help? Kevin what do you think?