In 1984 Law Yuh-Wu proposed 15 in A preliminary study on the taxonomy of the family Magnoliaceae, Acta Phytotaxonomica Sinica 22: 89-109; in 2004 even 16, in Magnolias of China.
Το 1984, ο Law Yuh-Wu πρότεινε 15 στο «A preliminary study on the taxonomy of the family Magnoliaceae», Acta Phytotaxonomica Sinica 22: 89-109· και το 2004, ακόμη 16, στο «Magnolias of China».