Les Chênes américains pas au Nord de 48°<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">.</supplied> Ceux <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0005696 https://www.geonames.org/6255148">d’Europe</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> en <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0001715 https://www.geonames.org/3144096">Norwège</placeName><supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> pas au <lb xmlns="http://www.tei-c.org/ns/1.0" />Nord de 63°, en Ingermanie 60°. <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010218 https://www.geonames.org/2016590">Sibérie</placeName> 57½<supplied xmlns="http://www.tei-c.org/ns/1.0" cert="high">,</supplied> mais espèces <choice xmlns="http://www.tei-c.org/ns/1.0"> <abbr>différ</abbr> <expan>différentes</expan> </choice>.