Wow! I'd urge you to include "Ruby" by Cynthia Bond. It's brutal but beautiful. I'd consider "The Immortal Life of Henrietta Lacks" too.
Thavolia Glymph, Out of the House of Bondage: The Transformation of the Plantation Household (2008)
A good book on relations between black slaves/white mistresses, and the particular type of violence done by white women. Read this in a graduate history seminar last semester and it was one of the favorites! Very clear writing, a compelling argument, and a good intervention in Southern race/gender histories.
I suggest you consider the historical novel, _The Invention of Wings_, by Sue Monk Kidd
Here are some on women in the South, mostly post-WWII:
Murray, Gail S. Ed. Throwing Off the Cloak of Privilege: White Southern Women Activists in the Civil Rights Era. Gainesville: University Press of Florida, 2004.
Fosl, Catherine. Subversive Southerner: Anne Braden and the Struggle for Racial Justice in the Cold War South. New York: Palgrave Macmillan, 2002.
Sims, Anastatia. The Power of Femininity in the New South: Women’s Organization and Politics in North Carolina, 1880-1930. Columbia: University of South Carolina Press, 1997.
That seems like a very interesting course. Are you interested only in gender or also sexuality? My work focuses more on southern LGBTQ history and can send you a bibliography on the subject as well if you want.
Check out the Journal of Women’s History Volume 8, Number 3, Fall 1996. It has a whole section on Southern Women in History and Historiography - and those articles might lead you to more studies.
Here are a few suggestions of works that deal with the U.S. South through a gendered lens:
Scott Stephan's Redeeming the Southern Family: Evangelical Women and Domestic Devotion in the Antebellum South. The chapter on courtship has good material on southern masculinity in such contexts. I also recommend Robert Elder's The Sacred Mirror, especially the chapter entitled 'Dual CItizens and a Twice Sacred Circle: Men, Women, and Honor in the Local Church.'
Several good essays in Southern Manhood: Perspectives on Masculinity in the Old South. I especially like Edward Baptist's chapter.