Sounds like one my Mom made too! We called it:

Five-Cup Fruit Salad

1 C. canned crushed pineapple, drained
1 C. mandarin oranges, drained
1 C. mini-marshmallows
1 C. flaked coconut
1 C. dairy sour cream

Mix together & chill several hours or overnight before serving.

*note* Mom added halved marischino cherries to dress this up for company!