Anatomy and morphology suggest a hybrid origin of Zamia katzeriana (Zamiaceae)

Two new species of Helicascus (Morosphaeriaceae) from submerged wood in northern Thailand

Taxonomy and ecology of Fragilaria billingsii sp. nov. and analysis of type material of Synedra rumpens var. fusa (Fragilariaceae, Bacillariophyta) from Brazil

Notes on the ornamental potential and taxonomy of Justicia (Acanthaceae, Justicieae), including a first record for the Paraíba flora, Brazil

Two new Chrysosporium (Onygenaceae, Onygenales) from China

Eugenia veraguensis (Myrtaceae), a new species from Golfo de Chiriquí in Veraguas Province, Panama, with notes on Eugenia rhombea

Argostemma laotica (Rubiaceae), a new species from Laos

Correcting the type designations of Caryodaphnopsis baviensis and C. laotica (Lauraceae)