Indigen
In general usage the word indigen is treated as a variant of the word indigene, meaning a native.
Usage in botany
However, it was used in a strictly botanical sense for the first time in 1918 by Liberty [Hyde Bailey] and described as a plant" of known habitat ".Later, in 1923, Bailey formally defined the indigen as:
Botanical definition
"... a species of which we know the nativity, - one that is somewhere recorded as indigenous. "The term was coined to contrast with cultigen which he defined in the 1923 paper as:
"... the species, or its equivalent, that has appeared under domestication, – the plant is cultigenous."