One of my favourite multi-purpose vegetables and one of my first unusual vegetables  that I grew in my garden in the 80s was burdock or borre, more specifically various Japanese cultivars of Arctium lappa, hardly used in Europe and North America apart from a few foragers, even though it’s a common wild plant and hardy.  Although it is best known as a root vegetable, there are varieties bred for their leaf petioles and the flower stems are really delicious! If you add to this that the seeds are foraged by various birds like goldfinches and greenfinches in winter in addition to being impressive photogenic plants which tolerated shady conditions, no permaculture garden should be without them!
In the album below are pictures I’ve taken over the years, in my garden, in botanical gardens and in the wild. There follows links to various blog posts about burdock!

Burdock in Japan
http://www.edimentals.com/blog/?p=11024
Burdock and goldfinches
http://www.edimentals.com/blog/?p=8810
Greenfinches on burdock
http://www.edimentals.com/blog/?p=2642
Cardboard and fiberboards from Burdock and about its cultivation
http://www.edimentals.com/blog/wp-content/uploads/2015/11/Br%C3%B8ndegaard_on_burdock.pdf
An interesting barlotto (burlotto?)
http://www.edimentals.com/blog/?page_id=4052
Goldfinches
http://www.edimentals.com/blog/?p=2768
Perennial Greens June 2015 (including burdock flower stems)
http://www.edimentals.com/blog/?page_id=1772
Flower stem sweet and sour
http://www.edimentals.com/blog/?page_id=1535
Burdock Flower Stalk Curry
http://www.edimentals.com/blog/?p=15132
Edinburgh’s Burry Man
https://www.youtube.com/watch?v=Ro4DXRMVdgY