Salvia hasankeyfense (Lamiaceae), a new species from Hasankeyf (Batman, South-eastern Turkey)

Decalepidanthus (Boraginaceae) includes and antedates Pseudomertensia; a synopsis of the genus

Sonerila bokorense (Melastomataceae), a new species from Cambodia

Phylogenetic placement and new data on macro and micro morphology of Nopalxochia phyllanthoides (Cactaceae), an endangered species from Mexico

Rediscovery of Tordylium brachytaenium (Tordylieae, Apioideae, Apiaceae), an endemic and threatened species in Turkey

Gynochthodes leonardii: a novel species of Morindeae-Rubiaceae from Palawan, Philippines

Two new species of Euphorbia subg. Chamaesyce (Euphorbiaceae) from Baja California Sur, Mexico and their phylogenetic relationships

Taxonomic identity of Torenia leucosiphon (Linderniaceae) and its resurrection from the synonymy of Torenia travancorica

Two new species of Navicula (Bacillariophyta, Naviculales) from the Cascade Mountains of the American Northwest

Two new species of Calanthe (Orchidaceae: Epidendroideae) from Korea