Rue

This (as informed by the Head Gardener) is Chinese rue. 
There is an old superstition that says: Take a shoe that the woman you love has worn, fill it with rue, and hang it over your bed to make her love you. 
I suggested this to the Head Gardener who responded: 'That doesn't apply to Chinese rue.' 
'Oh', I said, disappointed. 
'We have the right rue just around the corner in the garden'. 
Astonished I say., 'Have we?' 
'Yes, but don't get it on your hands because the sap from the stalks can irritate or maybe burn.' 
Me: 'Who knew?'