Author:Karl Andreas Geyer

Works

 * Charles A. Geyer's Botany Journal written on Joseph N. Nicollet's 1838 expedition to survey the Missouri and Mississippi rivers.


 * Notes on the vegetation and general character of the Missouri and Oregon territories: made during a botanical journey from the State of Missouri across the south-pass of the Rocky Mountains to the Pacific during the years 1843 and 1844.


 * Chronik des Gartenwesens und Feuilleton der Isis: Organ für Gärtner, Gartenbesitzer, Garten- u. Naturfreunde (1851-1853).

Works about Geyer

 * Charles A. Geyer, pioneer botanist of upper Oregon by Thomas R Cox, (Boise, ID : Idaho State Historical Society, 1999)