In September 'til frost the Small White Morning Glory, Ipomoea lacunosa, is found in Pittsylvania County, Virginia. The flower measures 1/2"–3/4" and is rarely bluish. This specimen was photographed in a woodland edge near Java.
Also see this illustration in larger format, and compare with the Common Morning Glory (Ipomoea purpurea) and the Little Red Morning Glory (Ipomoea coccinatai).
Copyright © 2008 William T. Hathaway.