They are grown in tropical regions. The Ipomoea batatas also called the Sweet Potato has purple stems and is heart shaped. Has three-lobed leaves, and is five to ten centimeters long. In the summer their color is pale purple, but the base of it is darker or sometimes white. The A-Z Encyclopedia also states that they grow up to six meters or more. The batatas is also trumpet shaped. Another Ipomoea is the Ipomoea coccinea. It's also called the Red Morning Glory or Star Morning Glory. The A-Z Encyclopedia also states that they are Annual Twining Climbers that have green leaves
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