Clusiaceae s.l. (Calophyllaceae, Clusiaceae s.s. and Hypericaceae) in the Viruá National Park, Roraima, Brazil
Observations on a fragilarioid diatom found in inter-dune lakes of the Badain Jaran Desert (Inner Mongolia, China), with a discussion on the newly erected genus Williamsella Graeff, Kociolek & Rushforth
A taxonomic revision of the western South American genus Presliophytum (Loasaceae)
Reappraisal of Campanula rotundifolia var. bulgarica Nejceff—a neglected taxon from Central Stara Planina Mountain, Bulgaria
Prodromus of a fern flora for Bolivia. XIII. Anemiaceae
Prodromus of a fern flora for Bolivia. XII. Lygodiaceae
Prodromus of a fern flora for Bolivia. XIV. Schizaeaceae
Prodromus of a fern flora for Bolivia. XV. Marsileaceae
Prodromus of a fern flora for Bolivia. XVI. Salviniaceae