Jerlene: "Molly/Mollie" is a pet-name for Mary. Excellent possibility was Mary J. Vermillion (9 Feb 1833 - 1 Jul 1923). Her death certificate online https://familysearch.org/
There's also a findagrave memorial in Denton for her and Reuben Vermillion (12 May 1831 - Feb 1913). Quite a complex research for both! Reuben's pension application indicates use of an alias: John Wilkerson. Mary J. (nee: Way) Vermillion was married twice prior to Reuben. If they were Rosa's parents, she was born in the couple's late-years? Another clue, methinks, found in Jessie Reuben Randall's (5 Jul 1898 - 20 Feb 1945) name?