Sweet potato related to morning glory

Okay, here is how I got confused. Ipomoea is sweet potato (Ipomoea batatas) and morning glory (Ipomoea tricolor). I know you are not supposed to eat the morning glories. However, a call to poison control a few years back reassured me that Logan(8 years of age) and Rhonda (39 years of age) would not die from eating the flowers, but they could have visions from eating a lot of the seeds (I didn't share that part with them). When Logan tasted Datura we had a problem, that is poisonous and he had a numb mouth for a while. Turns out he spit it out when it didn't taste like the morning glories.