A New Combination of Parakmeria ( Magnoliaceae ) from Vietnam
越南拟单性木兰属一新组合

Magnolia nitida var. robusta B. L. Chen & Nooteboom is elevated to species rank and transferred to the genus Parakmeria Hu & W. C. Cheng as Parakmeria robusta (B. L. Chen & Nooteboom) Q. N. Vu & N. H. Xia. It differs from P. nitida (W. W. Smith) Y. W. Law by having larger leaves, longer petioles, gynoecium hidden by the androecium (vs. exceeding from the androecium), flowers bisexual and male (vs. bisexual), tepals cream white (vs. yellow), and connective appendage ca. 0.3-0.5 mm (vs. 3-3.5 mm).