Taxonomic studies of Australian seaweeds are showing a wealth of undiscovered species. In this paper, a new species of green seaweed, Rhipilia psammophila, is described for specimens from south-western Australia, and a closely related species currently known as Chlorodesmis baculifera is transferred to Rhipilia. Morphological features are proving unreliable in distinguishing genera in this group and molecular analyses are essential. (Photograph by John Huisman.)

Our investigation of the Australian arid zone specialist Hibiscus krichauffianus resulted in the discovery of two new species, H. verecundus and H. calcareus, both of which are described here. We also recircumscribe and lectotypify H. krichauffianus, and raise a phrase name entity. Distribution maps, figures, a table of morphological differences and a key are provided to identify these species. (Image credit: Dave Albrecht.)