Mystery plant - help!

During a visit to Dorset last year, my friend and I bought a couple of plants from a table outside a village hall. Most were readily recognisable herbs but there were two pots of a plant that neither of us recognised. We bought them and determined to find out what the plants were. Sadly, I am still none the wiser!

The plant has flourished in a pot in my garden, it stayed small throughout summer but shot up in autumn. It smells wonderful and had small yellow/green flowers for a very brief period during the autumn.

I have attached a picture and would be so pleased to finally discover what it is. :yho:

 

hi, wheres your picture?:cnfs:


willow.x