Boronia (Rutaceae) comprises 134 described species, of which 130 are endemic to Australia and the remaining four endemic to Grande Terre, New Caledonia. This study resolves infrageneric limits within the genus and the placement of several morphologically distinctive species. The pollination biology of species with highly derived flowers is discussed. The novel infrageneric classification will provide a framework for future research and conservation programs in the genus.

The Eriostemon Group, which includes Phebalium and its allies, contains 18 genera and ~210 species that represent a significant component of Rutaceae, the Boronia and orange family, in Australasia. We aimed to test generic limits and determine the relationships within and among genera. The placement of several unusual species is resolved, generic limits are clearly defined, and novel infrageneric classifications proposed, all of which provide a framework for future research and conservation programs in the family.

Diplacrum (Cyperaceae) is a small sedge genus in tropical regions. We describe two new Australian species, both of dwarf habit and commonly confused with D. pygmaeum. A generic description is provided, as well as a key to the Australian, Malesian and South-East Asian species. Brief comments are made about the species in Africa, tropical Americas and India.

A species of brown algae, described originally from New Zealand as Dictyota papenfussii, has been shown to belong to a new genus, described here as Lindauera, the name honouring the New Zealand phycologist, Victor Lindauer. Although it shares many features with Dictyota, the genus Lindauera can be distinguished on the basis of phylogenetic analyses and features of its holdfast system. Molecular evidence shows this genus is also in New South Wales and South Australia, and further research on its distribution is required.