paintings

nope.

Personally, I have no knowledge of her; however, if you want to research the artist Joyce Clark, then you should type her name as the keyword at a search engine such as Google. If you do that search on her, the following (Artist Bluebook) is one of the many results:

http://www.askart.com/askart/c/joyce_clark/joyce_clark.aspx

Is the one?

http://www.hanacoast.com/Joyce_Clark.HTML

a friend of mine knew her and is still friends with Joyce's daughter.

a friend of mine is friends with her daughter. Joyce Clark passed away end of Jan '09. Just read her obituary in the Bend Bulletin online. My friend may know some things about her paintings if that is what you are wanting to hear. I will contact her and see if she is interested in making contact with you.
Thanks, M.L.