<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">Populus tremuloides</topic></authority><related type="other"><topic>American aspen</topic></related><related type="other"><topic>Populus tremula</topic></related><related type="broader"><topic>Populus</topic></related><variant type="other"><topic>American aspen</topic></variant><variant type="other"><topic>American poplar</topic></variant><variant type="other"><topic>American quaking aspen</topic></variant><variant type="other"><topic>quaking aspen</topic></variant> <note xml:lang="en"><![CDATA[ Species of tall, fast-growing tree native to cooler areas of North America. The name refers to the tendency of leaves to tremble or quake in even a slight breeze due to their flattened petioles. It is most easily distinguished from a similar European species, P. tremula, by the shape of its leaves, which have more pointed tips, and by growing via root suckers: it propagates itself primarily through root sprouts, and extensive clonal colonies are common. The leaves are food for various insects. A substance in the bark was extracted by Native Americans and the pioneers of the American West as a quinine substitute. The soft, weak wood is used as paper pulp and for other purposes. ]]></note></mads>