Colonel Julius Caesar Bonaparte Mitchell, C.S.A.
Although Mitchell was photographed with the insignia of a general, he never rose above the rank of colonel in the 34th Alabama Infantry. Major campaigns and battles of the 34th Alabama include Murfreesboro, Chickamauga, Missionary Ridge, the Atlanta campaign, Franklin, and Nashville.
Brewer, Willis. Alabama: Her History, Resources, War Record, and Public Men from 1540 to 1872.
Davis, William C., ed. The Confederate General. Vol. 4. National Historical Society, 1991.
P.S.... He is not listed by Ezra Warner in "Generals in Gray" nor Bruce Allardice in "More Generals in Gray". The ADAH webite further states the date of the photo as "circa 1863". My guess is maybe he borrowed a coat for the picture?