it's pretty rare I hear!
not many sources for this species!
I have one that I'd like to try to graft onto Rollinia deliciosa rootstock.
they seem like they'd be a good match!
the first year of growth for my A. spraguei was very slow, but now it's picking up the pace...it seems to like very bright indirect sunlight when it's young...the foliage is delicate, soft, and beautiful! I always touch the leaves when I'm near the plant!