Editing 1864 in science (section)

==Botany==
* [[English people|English]] botanist [[Richard Spruce]] completes a 15-year expedition to the [[Andes]] and [[Amazon Basin]] during which he has collected more than 30,000 plant specimens.<ref>{{cite journal|first=Richard|last=Spruce|title=Hepaticae of the Amazon and the Andes of Peru and Ecuador|journal=Transactions and Proceedings of the Botanical Society|location=Edinburgh|year=1884|volume=15|issue=1-2}}</ref><ref>{{cite book|editor=Wallace, Alfred Russel|editor-link=Alfred Russel Wallace|last=Spruce|first=Richard|title=Notes of a botanist on the Amazon and the Andes... during the years 1849–1864|url=https://archive.org/details/b31360117_0004|publisher=Macmillan|location=London|year=1908}}</ref><ref>{{cite book|last=Pearson|first=Michael|title=Richard Spruce: naturalist and explorer|publisher=Hudson History|location=Settle, Yorkshire|year=2004|isbn=1-903783-28-3}}</ref>