It all seems to be based on the twist of the leaf, and the colour.
Mmm... no, I think that is the difference between the Cretan and Turkish f orms of
Daphne gnidioides, rather than between the two species.
Only mention of Daphne gnidium is this:
so.... the only info about D. gnidium is that it is a straggly shrub native to southwest europe
and this, about its ancient herbal uses (
)