I have an area in my back yard, part/sun, good soil, good drainage, wind protected and would like to plant either a magnolia sieboldii or magnolia wilsonii, but I have only been able to find pictures of the blooms, not the tree shape. I know the Wilsonii is a multi stemmed tree, but I can't figure out if the sieboldii is a tree shape or shrub. I'm looking for a tree shape. Also, I had intended to plant a flowering dogwood but read so much about disease problems that I became intimidated. Is this really a problem for my area? Which tree would you recommend for Portland Metro area backyard? The tree would be at least 10 feet from fence and other sides would be open to flower beds and grass yard. I appreciate any comments.