A phylogenetic analysis, using 55 morphological and anatomical characters, of
all 58 species of Boronia section
Valvatae was completed. On the basis of this analysis
B. alata, B. algida and
B. edwardsii are removed from section
Valvatae and it is proposed that two new sections be
erected to accommodate them. Boronia section
Valvatae s. str., apart from valvate and persistent
petals, is defined by the of presence stellate hairs, valvate sepals and
axillary inflorescences. An infrageneric classification, based on the
cladogram, of Boronia section Valvatae s. str. is proposed and includes four
subsections, nine series and five subseries. Of the four subsections,
Ternatatae is endemic to the south-west of Australia,
Bowmaniae to Cape York, and
Grandisepalae to the ‘Top End’ of the
Northern Territory (including north-west Queensland) and the Kimberley Region.
Subsection Valvatae is widespread but is predominantly
found in the south-east of Australia