The short answer is yes. There are also many types of ipomoea that have edible roots. Not just ipomoea batatas which we call the sweet potato.
The ornamental sweet potatoes I've grown have bloomed in the morning same as my morning glories.
Ipomoea pandurata which is a US native also has an edible root so I've read-
Man of the earth (Ipomoea pandurata)
