Ivy-leaf Morning Glory
Ipomoea hederacea
From Wildflwowers of the United States
Recent DNA studies did not resolve the debate, although patterns seem to imply that it has at least partially obtained its current distribution as agricultural activities spread, although some of that might have occurred prior to the beginning of historical botanical records in North America. It was recorded as being in eastern North America in 1805 by Michaux. Some authorities say that Ipomoea hederacea might have originated in the southeastern United States. (Since the majority seem to consider it non-native to the U.S. It is considered weedy in much of its range, covering the entire eastern United States except for Vermont and Rhode Island, and west to North Dakota down to Texas. It is also found in New Mexico, Arizona, and possibly California.
The flowers of Ivyleaf Morning Glory are sky blue, pink, or white; I have seen some photographs of a darker blue as well, but wonder if those might have been Ipomoea nil, which some consider to be synonymous with Ipomoea hederacea.
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The calyx, pedicel, and peduncle of Ivyleaf Morning Glory are covered with spreading hairs. The elongated, narrower tips of the sepals are much longer than the body of the sepal; similar I. purpurea has sepal tips which are shorter than or only slightly longer than the body.