Käthe Hoffmann was a German botanist who described many plant species in New Guinea and South East Asia including Annesijoa novoguineensis. She was a professor at Breslau, German Empire, and made a significant contribution to botany. In one study, she was found to have co-authored or authored 354 land plant species, the sixth-highest number authored by any female scientist. As of May 2020, Plants of the World Online lists 439 accepted genera and species which include Käthe Hoffmann in the authority, in some capacity.
While some sources give her year of death as 1931, this is impossible as she was the author of two papers published in Revista Sudamericana de Botánica in 1942, one of them being an obituary of Ferdinand Albin Pax.