I have visited the Kruckeberg gardens many times and have seen him while there visiting, taking classes or volunteering.
I recently came across his name in the acknowledgements section of my daughter's summer reading book...Into the Wild. It is about a young man who decided to try to live off the land in Alaska. It is theorized that he died of malnutrition/starvation after consuming the seed pods of a wild potato plant. He had been consuming the tubers during the growing season, and the book that he had brought as a guide made no mention of seed toxicity...the author had to research all the back to an earlier expedition to find any mention of poisoning from the seed pods. Art was undoubtedly contacted for his expertise in native plants.
He will most certainly be missed.