Rosemary DeCamp 
Rosemary DeCamp was born November 14, 1910. Her soft,
beautiful looks won her a host of roles that spanned a rich
television and movie career. At differing times in her life,
Rosemary could play the seductive leading lady or the sweet,
innocent sister.And she made a graceful transformation to the
gentle "momma"-type as she portrayed for Helen Marie, Ann's mother
in "That Girl". She managed to allow her TV husband, Lew Parker
(as Lou Marie) to take center stage to her "straight-man", while
still coming off as a strong presence. She had a short run in the
sitcom, "Petticoat Junction" as Aunt Helen when Bea Benaderet
(Kate) was too ill to appear, and she went on to play the part of
Shirley Partridge's mother in "The Partridge Family in the 70's.
She also appeared in the remake of "The Time Machine". She
currently lives in California and is doing well.
Petticoat Junction episodes featuring Rosemary DeCamp as Aunt
Helen:
1. Mae's Helping Hand 2-24-68
2. Bad Day at Shady Rest 3-2-68
3. Cannonball For Sale 3-9-68
4. My Pal Sam 3-16-68
5. Ring-A-Ding-Ding 3-23-68
6. Kate's Homecoming 3-30-68
She was also in an episode during the first season:
Kate and the Manpower Problem 3-17-64 - appearing as Emily
Mapes