Question
do they exist?what are there physical characteristics,costs,and suitable habitat,and where can they be purchased?

Answer
There is a couple of dwarf dogwoods. (Cornus florida Little Princess and (Cornus cadensis)
a.k.a. bunchberry, pigeon berry

Here is a web limk to information on it and another to a site that sells both. I would check with your local nursery and see if they had them or could get them for you.
http://www.bcadventure.com/adventure/wilderness/wildflowers/dwarfd.htm

http://www.waysidegardens.com/webapp/wcs/stores/servlet/StoreCatalogDisplay?stor...