Prodromus of a fern flora for Bolivia. XIV. Schizaeaceae
Prodromus of a fern flora for Bolivia. XII. Lygodiaceae
Prodromus of a fern flora for Bolivia. X. Hymenophyllaceae
Prodromus of a fern flora for Bolivia. IX. Osmundaceae
Prodromus of a fern flora for Bolivia. VII. Equisetaceae
Prodromus of a fern flora for Bolivia. VI. Psilotaceae
Prodromus of a fern flora for Bolivia. V. Ophioglossaceae
Prodromus of a fern flora for Bolivia. I. General introduction and key to families
A new species of Begonia section Casparya from the Colombian Eastern Cordillera and a key to the Colombian Casparya
A revision and recircumscription of Begonia Section Pilderia including one new species
