SB23011Plastid phylogenomics of the Eriostemon group (Rutaceae; Zanthoxyloideae): support for major clades and investigation of a backbone polytomy

Harvey K. Orel , Todd G. B. McLay , Will C. Neal, Paul I. Forster and Michael J. Bayly

pp. 355-385

Genetic relationships in the Eriostemon group are assessed using a dataset derived from whole plastome DNA sequences, focussing primarily on relationships between genera and sectional limits in Philotheca. We found high support for several clades of genera, but also a poor resolution of relationships in the backbone of the tree. Philotheca was found to be polyphyletic, with some sections closely related to other genera.

SB22031Eucalyptus cryptica (Myrtaceae): a critically endangered new species

Trevor C. Wilson , Susan Rutherford , Jia-Yee S. Yap , Steven M. Douglas, Enhua Lee and Maurizio Rossetto

pp. 386-400

The critically endangered Eucalyptus sp. Cattai has recently been identified as a species by a population genomic study. Still lacking a name, measurements and further genomic analysis were provided here to produce a robust description for the new species E. cryptica. The identification of a new species of tree is exceedingly rare in a metropolitan area and the provision of a name will provide stronger recognition that the species merits conservation.

SB23007Taxonomic revision of Australian Erythrophleum (Fabaceae: Caesalpinioideae) including description of two new species

Russell L. Barrett and Matthew D. Barrett

pp. 401-426

Ironwood, Erythrophleum chlorostachys, is an iconic legume tree in the northern Australian savanna, with relatives in Asia and Africa. Fieldwork across northern Australia has discovered two new species, one from around The Great Sandy Desert, and one spanning from the west Kimberley to Cape York. Recognition of three distinct species, on the basis of morphology and DNA data, has implications for the conservation and utilisation of this genus, significant in indigenous cultures in northern Australia. (Photograph by Geoff Byrne.)