Maybe she married again, later. If so, this could be her - Daphne Ophelia (JONES) Boomer Washburn.
"California, County Marriages, 1850-1952," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:K824-4SN : accessed 18 April 2016), Eugene Washburn and Daphne Ophelia Boomer, 18 May 1950; citing Los Angeles, California, United States, county courthouses, California; FHL microfilm 2,117,734.
Hope this helps! -NGP