Can anyone give me some advice on how to find my Grandmother, Edith H. (Prather) Davis through the Daughters of America? Or what the difference is in DOA and DAR?

She was in the Star Spangled Banner Council #7, Daughters of America, Seat Pleasant (MD) district. I've also seen it listed as the Capital Heights district.
She was a member in Jan 1918, as a Prather and in 1928 as Davis. I also have a printout for Nov 16, but no year, when her children were presented, after her death. I can't find the year for this.......which is hurting my research.

If the DOA is related to the DAR, her ancestor would most likely be Allen W. Prather. If anyone can advise me as to where I go from here and how to find more info, I would be greatly appreciative!!

Thanks so much!