Classification
Kingdom: Plantae (2654)
Phylum: Tracheophyta (2567)
Class: Magnoliopsida (2163)
Order: Malpighiales (100)
Family: Salicaceae (10)(family description)
Genus: Populus (4)
Epithet: maximowiczii × P. nigra clone max 4 (1)
maximowiczii => in honor of Karl Ivanovich Maximowicz (1827-1891), Russian botanist, plant collector and director of the herbarium at the St. Petersburg Botanical Garden