Typification of the North American species of Trillium subg. Trillium (Melanthiaceae: Parideae)
Carex talbotii (Cyperaceae), a replacement name for Berggren’s Sedge
A new type designation of Thymus microphyllus, basionym of Micromeria microphylla (Lamiaceae)
Strobilanthes mcgregorii, a replacement name for S. medocris (Bremek.) Y.F. Deng (Acanthaceae)
Lectotypification of names associated with Chenopodium hircinum (Chenopodiaceae/Amaranthaceae sensu APG): C. bonariense Ten. and two varieties described by Aellen
Rediscovery and lectotypification of Croton claussenianus (Euphorbiaceae), an enigmatic endemic species from southeastern Brazil
Taxonomic revision of the genus Dioon (Zamiaceae)
Notes on an overlooked Paepalanthus (Eriocaulaceae) from central Brazil: identity, taxonomic placement, and morphological details
Nomenclatural notes on Piper (Piperaceae) from India III
Lectotypification of the name Carex delavayi (Cyperaceae)
Typification and an emended description of Astragalus moussavii (Fabaceae, Papilionoideae)
Schoenus inconspicuus (Cyperaceae, tribe Schoeneae): a new species from Southern Africa
Why so different? A case study about Floras from a Mediterranean island
Nomenclatural clarification of the names Pelargonium althaeoides and P. chamaedrifolium (Geraniaceae)
Early Land Plants Today: Index of Liverwort and Hornwort names published 2017–2018
Taxonomic and nomenclatural notes on African Linum squarrosum sensu lato (Linaceae)
Begonia fimbritepala (Begoniaceae), a new species endemic to the Atlantic Coastal Forest in the state of Rio de Janeiro, Brazil
Heliophila vlokii is the correct spelling for H. volkii (Brassicaceae)
Typification of three names of Brazilian Prosthechea (Orchidaceae: Laeliinae)
The taxonomic identity of two neglected Sprengel names, Galinsoga megapotamica and G. uniflora (Asteraceae), with remarks upon Friedrich Sellow’s collections galore
Torenia maculata, a new combination in Asian Linderniaceae
Taxonomy and lectotypification of Lepidagathis barberi (Acanthaceae), a steno-endemic species from Tamil Nadu, India
Nomenclatural notes on the taxonomic identity of Sprengel’s Erigeron dubius, E. montevidensis, E. resinosus and E. filiformis (Asteraceae)
Nomenclatural novelties and typification of names in Scorzonera sensu lato (Asteraceae, Cichorieae) for the Italian vascular flora
Typifications, synonymizations and nomenclatural notes in Myrcia sect. Reticulosae (Myrtaceae)
Studies in Southeast Asian Melastoma (Melastomataceae), 4. Clarification of Melastoma crinitum in Southeast Asia and the reinstatement of Melastoma molle
The fern genus Oreogrammitis (Grammitidoideae: Polypodiaceae) re-defined
Further cleaning of the name pool in the New World Commelina (Commelinaceae), and notes on the African C. aquatica
Nomenclatural notes on Heliocarya (Boraginaceae) from Iran
On the Romanian endemic species of Salvia (Lamiaceae) and its natural hybrids: nomenclatural and taxonomic aspects
