Populus × canadensis
Two trees at the main entrance to Green Library, on the south side of the Bing Wing, are reputed to be of this transatlantic hybrid species, as is a specimen to the right of Sigma Chi, 550 Lasuen Mall.
Poplars and willows are principal actors in phytoremediation, a technique of treating contaminated groundwater. Poisonous metals such as zinc, arsenic, and mercury are sought by the roots; as a consequence, removal of a few cubic yards of plant material offers an economic alternative to bulldozing thousands of cubic yards of contaminated soil.
About this Entry: The main text of this entry is from the book Trees of Stanford and Environs, by Ronald Bracewell, published 2005.