Edible Jewellery- Hilde De Decker
Tomato plants with workshop and rings on hildededecker.com and on klimt02.net.
The cleverness of this series warrants many photos. I would post many more were I to find high res versions of them.
It has been a favourite piece since I discovered it (last year-ish) and it is brilliant in it use of organic materials and the mix of living & inert, permanent and impermant.