Foraging for autumn flowers…

There's something deeply comforting about being indoors, warm and cosy, when the wind is howling outside and the rain batters against the windows, don't you find?   As a result, I've had a very enjoyable weekend.  (That, and the fact that I don't have a shed for the roof to blow off.)  We've had some extremely variable weather over the last couple of days - in common with the rest of the UK - but I managed to get out for a bracing walk and foraged for these beautiful hydrangea heads (actually, growing by one of our flats so not too much foraging!) 

I was inspired to think again about hydrangeas as a cut flower after being given a bunch of flowers used as a table decoration at a wedding reception.  This posy was full of rich plums, purples, aubergines and greens, being made up of hydrangeas, berries and another plant which I can't identify: 

This, by the way, is the dried up version. (It's stayed on my kitchen windowsill for at least two months while I've pondered this puzzle!)  The plant also crept into an earlier photo when I posted a recipe for custard tarts:

So, gardening friends: If you know what this is (and I'm positive there's a fair few of you who do), please please put me out of my anguish!  (So far I'm thinking fennel or angelica but I'm probably way off the mark.)