Sigesbeckia australiensis ssp. australiensis
Asteraceae
Cobber Weed,
Australian Sigesbeckia
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
Display IBRA region text
Fleurieu (KAN02) | Kanmantoo | Data Deficient [could be S orientalis] |
Mount Lofty Ranges (FLB01) | Flinders Lofty Block | Data Deficient [could be S orientalis] |
Olary Spur (FLB03) | | Data Deficient |
Southern Flinders (FLB04) | | Near Threatened (Probable Decline) |
Northern Flinders (FLB05) | | Least Concern [likes rocky hills] |
Central Flinders (FLB06) | | Least Concern [likes rocky hills] |
Eyre Hills (EYB03) | Eyre Yorke Block | Rare (IUCN: RA d(i,ii)) (Probable Decline) |
Eyre Mallee (EYB05) | | Rare (IUCN: RA d(i,ii)) (Probable Decline) |
Myall Plains (GAW01) | Gawler | Rare (IUCN: RA d(ii)) (Probable Decline) |
Gawler Volcanics (GAW02) | | Least Concern |
Gawler Lakes (GAW03) | | Rare (IUCN: RA d(i,ii)) (Probable Decline) |
Arcoona Plateau (GAW04) | | Rare (IUCN: RA d(ii)) |
Kintore (GVD04) | Great Victoria Desert | Least Concern [likes rocky hills] |
Barrier Range (BHC01) | Broken Hill Complex | Data Deficient |
Bimbowrie (BHC05) | | Near Threatened (Probable Decline) |
Curnamona (BHC06) | | Data Deficient |
Murnpeowie (STP03) | Stony Plains | Near Threatened [edge of range] |
Mann-Musgrave Block (CER01) | Central Ranges | Least Concern [likes rocky hills] |
Watarru (CER02) | | Least Concern [likes rocky hills] |
Everard Block (CER03) | | Least Concern [likes rocky hills] |
Tieyon (FIN03) | Finke | Least Concern [likes rocky hills] |
Fleurieu (KAN02) | Kanmantoo | Data Deficient [could be S orientalis] |
5 of 6 subregions | Flinders Lofty Block | Least Concern , Near Threatened , Data Deficient |
2 of 5 subregions | Eyre Yorke Block | Rare |
4 of 8 subregions | Gawler | Least Concern , Rare |
Kintore (GVD04) | Great Victoria Desert | Least Concern [likes rocky hills] |
3 of 4 subregions | Broken Hill Complex | Near Threatened , Data Deficient |
Murnpeowie (STP03) | Stony Plains | Near Threatened [edge of range] |
3 of 3 subregions | Central Ranges | Least Concern |
Tieyon (FIN03) | Finke | Least Concern [likes rocky hills] |
Botanical art
Kath Alcock paintings: 5
Prior names
Sigesbeckia australiensis
Sigesbeckia microcephala
Common names
Cobber Weed
Australian Sigesbeckia
Etymology
Sigesbeckia named after Johann Georg Siegesbeck (1686-1755), a German physician, botanist, director of the Botanical Gardens at St Petersburg and an opponent of the Linnean system. He named this small-flowered, unpleasant-smelling, weedy genus after him. following their bitter rivalry. Grows in mud. Australiensis means of or from the south, referring to the distribution of the species in the Southern hemisphere.
Distribution and status
Found in the south-central and far north-western parts of South Australia, growing on shallow stony soils on hillslopes in drier inland habitats. Also found in the Northern Territory, Queensland, New South Wales and Victoria. Native. Common in South Australia. Common in the other States.
Herbarium regions: North Western, Lake Eyre, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Southern Lofty
NRM regions: Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands
AVH map: SA distribution map (external link)
Plant description
Erect herb to 80 cm high with slightly pubescent, brownish stems. Leaves lanceolate to elliptic, to 90 mm long and 25 mm wide, in remote pairs; sessile or with a short petiole, pubescent; veins prominent. Inflorescence in dense clusters (capitula) of sessile yellow flowers to 10 mm diameter, with outer involucral bracts linear to oblanceolate, to 7 mm long; pubescent, with minute non-glandular hairs. Flowers in spring. Fruits are globular fruit with a number of seed segments in terminal clusters. Seeds are blackish. slightly angled seed to 3 mm long.
Seed collection and propagation
Collect seeds between September and December. Collect fruit that are maturing, turning yellow and fat with hard seeds. Place the fruit in a tray and leave to dry for 1-2 weeks or until it begin to split. Then rub the dried fruit to dislodge the seeds. Use a sieve to separate any unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.