Boronia hemichiton (mt arthur boronia) is an aromatic woody shrub that occurs in wet heath/scrub and is only known from the western flanks of Mount Arthur in northeast Tasmania. The species has a linear range of 3.9 km, and the total number of mature individuals is estimated to be fewer than 2,500, its highly restricted distribution making it susceptible to extinction from chance events. The species is at risk from inappropriate fire regimes and impacts of climate change that may reduce the potential for recruitment from the soil seed store. Predation of seed by insects is likely an issue for the species (as it is with the closely related Boronia hippopala), and may increase with outbreaks associated with changed environmental conditions. Planning considerations will alleviate potential indirect impacts from adjacent forestry activities and the species will also benefit from proposed forest reserves.
- Important: Is this species in your area? Do you need a permit? Ensure you’ve covered all the issues by checking the Planning Ahead page.
- Important: Different threatened species may have different requirements. For any activity you are considering, read the Activity Advice pages for background information and important advice about managing around the needs of multiple threatened species.
Flowering of this shrub has been observed from October to January. The species can be identified at any time of the year using leaf characteristics though intergradation with Boronia hippopala can confuse identification.
- The species grows in wet heath or scrub with species like Callistemon viridiflorus, species of Melaleuca, Leptospermum, and Gahnia, usually with scattered emergent eucalypts (Eucalyptus gunnii or Eucalyptus ovata), with the occasional plant at the scrub margins within Eucalyptus delegatensis forest. The underlying substrate is alluvium over Jurassic dolerite.
Cutting or clearing trees or vegetation
Changing water flow / quality
Check also for listing statement or notesheet pdf above (below the species image).