Hopniss (Apios americana) and Relatives
Hopniss, or groundnut (Apios americana), is one of two major native North American root crops (the other is Jerusalem artichoke). Although it is somewhat slow growing in the Pacific Northwest, it is a truly perennial crop that will produce good yields if allowed to grow for two or three years. The tubers are much like a very firm and dry potato and they can be used as a substitute in most potato recipes. It is a strong and attractive climber that grows really well along a fence or wall.