I have this growing in my zone 8 (SC) garden. I think it is some sort of Saucer Magnolia, which is often called a tulip tree where I live.
This one is about 5 years old, and no more than 24". It has white flowers that have a rosy mark underneath each petal. It is currently blooming, but we have had an extraordinary warm winter.
I am including pics of the entire plant and close ups of the buds and blooms.

Yours may be some type of hybrid bred to remain short, possibly one of the star magnolia.
Star Magnolia (Magnolia stellata 'Royal Star')

Or maybe this one:
Loebner Magnolia (Magnolia x loebneri 'Leonard Messel')

Yep, thinking its a Magnolia stellata

Leonard Messel has been a vigorous grower for me in California, and has grown more upright. I'd say 'Royal Star' is a good guess.