Three things.
1) I'm going to have to go harvest more of this tomorrow. I'm feeling anxious because they are clear cutting at least an acre of the alder forest where my patches are.
2) I am now comfortable claiming success on transplanting a number of these. They have just survived a unusual hot, dry spell, and I am fairly certain that they will take for good at this point. One patch is under a shady northeast corner shaded by a deciduous tree in rich soil. The other is on the shady bottom N/E corner of a 4 foot and steep (the kinda Hugel depicted in the Paul Wheaton Article) In pure alder humus. Gets plenty of direct sun even in that deep shade spot of the hugel.
3) I'm not an herbalist, but the way this man presents his information I am inclined to respect his opinion as being a well informed one. He had me at 6.30 "I wanted to see what effect this plant had on me so I went out in the forest and ate 15 or so plants whole..."