A native of Temple, Texas, Lacy was a pupil of Ellen Douglas Stuart and Ella Koepke Mewhinney.
In 1947 she took a position as chief occupational therapist at the Veterans Administration hospital in Temple, and two years later she moved to Houston to occupy the same role, remaining there until 1953.
[4] She exhibited her work widely, both in Texas and elsewhere in the United States,[1] and in 1943 was the subject of a one-woman show of prints at the Dallas Museum of Art.
[5] A scholarship in her honor at her alma mater, today the University of Mary Hardin-Baylor, was established by former pupil Marjorie Hamilton Gillies.
[6] Three of Lacy's prints, the linocut First Monday of c. 1935–1940[7] and the lithographs Left Side of Tracks, of 1940,[8] and the undated Summer Blankness,[9] are in the collection of the National Gallery of Art; they are part of the donation made to the museum by Reba and Dave Williams of the Print Research Foundation in 2009.