Magnoliaceae is a plant family that until recently has had 12 genera. Now that family has been merged into just two - Magnolia and Liriodendron.
One of the affected genera of this name change that is well known to gardeners is Michelia. It is one of the12 genera that based on molecular studies has been included into the genus Magnolia.
Examples of the name change:
Old Name
New Name
Michelia x alba
Magnolia x alba
Michelia champaca
Magnolia champaca
Michelia doltsopa
Magnolia doltsopa
Michelia figo
Magnolia figo
Michelia figo var.crassipes
Magnolia figo var. crassipes
Michelia yunnanensis
Magnolia laevifolia
Typically these name changes take a little while to infiltrate the nursery industry and plants will be available most likely under their old name for at least a couple of years to come.