Books by Charles Schweinfurth
First supplement to the Orchids of Peru
Orchidaceae of the Guayana Hig
Orchidaceae of the Guayana Highland
Flora de la Real Expedición Bo
Flora de la Real Expedición Botánica del Nuevo Reino de Granada
Orchids of Peru
A new dwarf Habenaria from Ama
A new dwarf Habenaria from Amazonian Colombia
Venezuelan orchids
Venezuelan orchids
Orchidaceae Peruvianae
Orchidaceae Peruvianae
[Notes on American Orchids]
[Notes on American Orchids]