Karl Andreas Geyer

As a teenager, Geyer worked as an apprentice-gardener in Zabeltitz, and in 1830 became an assistant at the botanical gardens in Dresden.

Geyer distributed duplicate specimens in an exsiccata-like series with partly handwritten labels and without title.

[2] Afterwards he joined explorer William Drummond Stewart (1795–1871) on an expedition through the present-day states of Nebraska and Wyoming.

Eventually, Geyer parted company with Stewart, and performed extensive botanical research in what would later be known as the Oregon Territory.

[3] However, Geyer left the U.S. west coast by boat, and sailed to England, delivering the plant specimens to William J. Hooker at Kew instead.