I am looking for the artist or title of a painting. The artist painted
a landscape to make a point to a fellow artist that any artist could
paint a landscape. The subject was a forest with the foliage
resembling the figure of a woman. The forest may be on a bluff
overlooking a river. The artist apparently was more intent on
irritating his fellow than fine art. I saw it referenced in a news
magazine at a Dr.s office and haven't been able to find out anything
about it at all.

The so called "Anthropomorphic landscapes" were popular among the
society in the second half of 16th century.
The oil painting called "Anthropomorphic landscape - portrait of a
woman" you described above, was painted by an anonymous master from
Southern Netherlands, in the second half of the 16th century and it is
conserved in Museum of Fine Arts in Brussels, Belgium.
The attached files contain the only two available right now in the net
pictures of this painting.
http://www.imageimaginaire.com/concours/FLM03/pages/IMAGE-FLM61.htm
The text, written in French, is not related with the picture.

http://www2.gazeta.pl/kobieta/1,24540,1330226.html

The text, written in Polish, contains the painting description:

The painting by unknown artist was painted in the second half of the
16.th century, when in the court society such surprising and puzzling
paintings, which created effect of illusions, were the most
appreciated. Such paintings were treated as a kind of a refined joke.

Much later the designs based on a similar "visual double mining"
started to be used for psychological tests. A kind of play reveals
many from the mechanisms of our perception not only in the art, but in
the reality. Looking at the painting we see or a landscape or a
woman's face, and the acceptation of a first or second version does
not cause any troubles to us.

There was much more works of such kind, i.e.:
works by Jose de Momper (1564-1634/35),

http://www.aiwaz.net/galleries/renaissance/41.htm
http://www.aiwaz.net/galleries/renaissance/40.htm

Matthaus Merian, the Elder (1593-1650)
http://www.aiwaz.net/galleries/renaissance/42.htm