Siemensia is a monotypic genus of flowering plants belonging to the family Rubiaceae.

[1] It only contains one known species, Siemensia pendula (C.Wright ex Griseb.)

[1] The genus name of Siemensia is in honour of Werner von Siemens (1816–1892), a German electrical engineer, inventor and industrialist.

He founded the electrical and telecommunications conglomerate Siemens.

[2] The Latin specific epithet of pendula means hanging.