Annals of Horticulture in North America 1892
L H Bailey

Ipomoea Heavenly Blue. Mrs. Theodosia B. Shepherd, Ventura, Cal.
The foliage is very large, heart-shaped, thick and light green; flowers four to five inches across in large clusters, and light blue with a yellow throat, suffusing softly into blue. Originated in the garden of Mrs. Shepherd, who thinks it "evidently a child of Ipomoea Learii and Mina lobata."