I received this query today and don't have any info. Can anyone offer
an answer or personal experience?

"are the tubers of marguarita & blackie ornamental ipomoea batatas
edible? we have been told they are called white sweet potatoes & can
be prepared the same as regular orange-fleshed sweet potatoes. i've
been unable to find information relating to edibility on several
websites."

All I have been able to find is a "No" at this informal website:

http://www.emilycompost.com/morning_glory.htm

Thanks,
Monique Reed