Ipomoea conzattii, sometimes called Jicama. Which use?

Hi,

last year, I bought some seeds of Ipomoea conzattii, because the seller said the tuber would be edible (and because I'm in love with sweet potatoes, so that I want to grow several species of them, and relatives).
He called it Jicama or Ipomoea tuberosa merremiat.
Just one seed germinated, and I now have a healthy (but small) plant. It is said to be perenial, but I think the stem and leaves are about to die because of the low temperatures.

Anyway, if it ever has made a tuber, would it be edible?
Do you know if I could get some sprouts like with other sweet potatoes in order to get much more plants next year?

Thanks!

This plant is from the family; Convolvulaceae, The complete name is;  Ipomoea conzattii  Greenm

Propagation Methods:

herbaceous stem cuttings

woody stem cuttings

softwood cuttings

semi-hardwood cuttings

seed; germinate in a damp paper towel

seed; germinate in vitro in gelatin, agar or other medium

There is little information available that I have been able to find but it appears that it is one of the species that you can extract lysergicides ( main component of LSD)  from and may be one of the species used for shamanic rituals.
I recommend you find out more about it before you get into active propagation for food use.

Redhawk