Biogeographical variability and re-description of an imperfectly known species Hamatocanthoscypha rotundispora (Helotiales, Hyaloscyphaceae)
Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal
A taxonomic revision of the Capparis spinosa group (Capparaceae) from eastern Africa to Oceania
A taxonomic revision of the genus Digitaria (Panicoideae: Poaceae) in mainland Southeast Asia
A new North African subspecies in the Helianthemum origanifolium aggregate (H. subg. Plectolobum, Cistaceae)
An annotated checklist to the trees and shrubs of the Upper Katanga (D.R. Congo)
Penium amplificatum status nova (Desmidiales, Streptophyta)
A new narrow-leaved species of Capparis (Capparaceae) from central Palawan, Philippines