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Summary

Rostkovia is a genus of flowering plants in the family Juncaceae. It was described in 1809 and was named after Prussian botanist Friedrich Wilhelm Gottlieb Rostkovius.
The genus is native to Ecuador, southern South America, New Zealand, and various antarctic and subantarctic islands.

Species
Rostkovia magellanica (Lam.) Hook.f. - South Island of New Zealand, Antipodes Islands, Ecuador, southern Chile, southern Argentina, Falkland Islands, South Georgia Islands
Rostkovia tristanensis Christoph. - Tristan da Cunha
Formerly included
moved to other genera: Marsippospermum, Patosia

Rostkovia brevifolia Phil. - Patosia clandestina (Phil.) Buchenau
Rostkovia clandestina Phil. - Patosia clandestina (Phil.) Buchenau
Rostkovia gracilis Hook.f. 1844. - Marsippospermum gracile (Hook.f.) Buchenau
Rostkovia gracilis Phil. 1858 - Marsippospermum philippii (Buchenau) Hauman
Rostkovia grandiflora (L.f.) Hook.f. - Marsippospermum grandiflorum (L.f.) Hook.
Rostkovia novae-zelandiae Buchanan - Marsippospermum gracile (Hook.f.) Buchenau
Rostkovia reichei (Buchenau) Hosseus - Marsippospermum reichei Buchenau