Let me try to sort this out a little bit. First of all, there were two Florence E. Hobdells. The first one, born in October 1859 (per 1900 St. Louis Census)married Humphrey Thomas Hobdell (later known as Henry Hobdell) 28 July 1881. The other Florence E. Hobdell was their daughter, born in December 1892.
Humphrey Hobdell died in 1904, leaving the mother a widow. I do not believe she ever remarried. She relocated to Stark County, North Dakota some time after being enumerated in the 1910 census in St. Louis City. She died 14 April 1934 in Stark County, North Dakota. Her name at the time was Florence E. Hobdell.
On the other hand, I don't know what happened to the daughter after she was counted in St. Louis City in 1910. I haven't been able to find her after that. She was just reaching marriageable age at that time, so it is possible she married and changed her name.
Florence E. Hobdell the mother gave birth to at least 10 children, but only two of them lived past one or two years of age (Florence, b. 1892 and William, b. 23 October 1888). There are quite a few mentions of her name in governmental records as the mother of children who were stillborn or died young. There are also at least two mentions of her daughter Florence being placed in some type of orphanage setting after the father died--probably because the mother had to go to work and couldn't care for her.
I think I found Florence E. Hill aged 20(the mother) living with her parents in St. Louis in the 1880 census, before she married Humphrey Hobdell. The parents were listed as Thomas and Mary E. Hill. Other siblings included Susan A. age 23, Joseph P. age 22, Mary E. age 15 and William A. age 4. Note the lengthy gap between the birth of Mary and William--this may indicate that Mary E. was the second wife of Thomas. This sibling "Joseph P" may be the "Joseph B" you are interested in.
Hope this helps.
Janis Greenlaw Seaton