Thank you Bryant,I was worried about getting a dreaded "air potato" by another name!
Your familiarity with it is reassuring.
Did you use only the actual yam or did you also use the aerial tubers?
A side note, the foliage of sweet potatoes are edible, does that apply to yams as well?
I've done some research, and I think in addition to this plant, I will buy a variety of true yams from
CAM and
Jungle Jims, and plant them, just to see what works.