Taxonomic revision of Chloanthaceae trib. Physopsideae.

A taxonomic revision of Chloanthaceae trib. Physopsideae is provided. The tribe is endemic in Australia and comprises five genera, Dicrastylis, Lachnostachys, Mallophora, Newcastelia, Physopsis, and 48 species with 37 infraspecific taxa. The following new species are described: Dicrastylis brunnea, D. cordifolia, D. georgei, D. glauca, D. incana, D. linearifolia, D. micrantha, D. microphylla, D. morrisonii, D. obovata, D. petermannensis, D. sessilifolia, D. velutina, Mallophora rugosifolia, Newcastelia elliptica, N. interrupta and TV. velutina. The new combination of Dicrastylis corymbosa (= Mallophora corymbosa Endl.) is made. The affinities of the genera and species are discussed, and their distribution considered. A new key to the genera and species is provided and the revised description of each taxon is supplemented in most cases by a habit sketch of a flowering branch and analytical drawings of the flowers.