CR

Scott River Jugflower

Adenanthos detmoldii

Declining

Overview

The Scott River Jugflower (Adenanthos detmoldii) is a low, spreading shrub in the family Proteaceae, distinguished by its wiry, divided grey-green foliage and small tubular red flowers characteristic of the genus Adenanthos, colloquially known as jugflowers for their distinctive floral shape adapted to bird pollination. This species is endemic to a narrow strip of southwestern Australia, with its known distribution centred on the Scott River area of Western Australia, where it grows in seasonally waterlogged sandy or peaty soils within low-lying heath and shrubland communities. Adenanthos detmoldii is classified as Critically Endangered (CR) on the IUCN Red List, reflecting an extremely restricted geographic range, a small number of known subpopulations, and a continuing decline in population attributed largely to habitat disturbance in a region under increasing agricultural and land-use pressure.

Individual plants rely on specialised sandy wetland-margin habitat that is inherently limited in extent, making the species highly vulnerable to any further loss or degradation of these sites. Despite its precarious status, targeted conservation attention has brought Adenanthos detmoldii into sharper focus among regional botanical authorities, with populations occurring partly within areas subject to conservation planning and monitoring by Western Australian land management agencies, offering a genuine, if fragile, opportunity to stabilise remaining sites through continued habitat protection and weed control. Ongoing survey work in the Scott River catchment continues to refine understanding of the species' precise range and habitat requirements, which is essential for guiding future recovery actions.

As with many narrow-range Western Australian endemics, its long-term survival will depend on sustained protection of remaining habitat fragments and active management of threats within its very limited known range.

The primary threat to Adenanthos detmoldii is the clearing and drainage of its specialised seasonally wet, sandy heathland habitat for agricultural development in the Scott River district. Altered hydrology from drainage works and adjacent land clearing degrades the waterlogged soil conditions this species depends on, while fragmentation increases the isolation of remaining subpopulations. Dieback caused by the introduced pathogen Phytophthora cinnamomi poses an additional risk to Proteaceae species in this region, potentially compounding habitat loss. Because the species is confined to such a small known range, even localised disturbance events can disproportionately affect the total population.

Threat summary

Habitat

Adenanthos detmoldii grows in seasonally waterlogged sandy or peaty soils within low heath and shrubland communities restricted to the Scott River area of southwestern Australia.

Conservation measures underway

Site/area protectionPolicies and regulations

Frequently asked questions

Why is Scott River Jugflower classified as Critically Endangered?
Scott River Jugflower is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. The primary threat to Adenanthos detmoldii is the clearing and drainage of its specialised seasonally wet, sandy heathland habitat for agricultural development in the Scott River district. Altered hydrology from drainage works and adjacent land clearing degrades the waterlogged soil conditions this species depends on, while fragmentation increases the isolation of remaining subpopulations. Dieback caused by the introduced pathogen Phytophthora cinnamomi poses an additional risk to Proteaceae species in this region, potentially compounding habitat loss. Because the species is confined to such a small known range, even localised disturbance events can disproportionately affect the total population.
Where does Scott River Jugflower live?
Scott River Jugflower occurs in Australia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Scott River Jugflower?
The main threats to Scott River Jugflower are 2.1, and 8.2. The full IUCN-classified threat record for this species is detailed on the species page.

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