I only grow these for their colour and leaf form, and not for their tubers, which are said to be edible. I know that the squirrels dig them up in the fall and eat them. I think I will stick to the grocery store varieties. The seed pods are supposed to be highly toxic. But that's okay. I snap the spent flowers off so that the plant will produce more flowers. I love this little plant, even more so now that I know it produces flowers!
Family: Convolvulaceae. Genus: Ipomoea. Species: I. batatas 'Blackie'.
Common name: Sweet Potato Vine Blackie.
Edit: Wanda from Exuberant Color posted about her Blackie today too. You can see it here.
And here are a few spooltjes (klosjes) I sewed together last night. I still have a lot of these to go.