Seeds of South Australia
Sigesbeckia australiensis ssp. australiensis (Compositae)
Cobber Weed
List of species for Sigesbeckia
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Seed collecting:
September to December
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
IBRA regions
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]
IBRA regions
Fleurieu (KAN02)KanmantooData Deficient
  [could be S orientalis]
5 of 6 subregionsFlinders Lofty BlockLeast Concern
, Near Threatened
, Data Deficient
2 of 5 subregionsEyre Yorke BlockRare
4 of 8 subregionsGawlerLeast Concern
, Rare
Kintore (GVD04)Great Victoria DesertLeast Concern
  [likes rocky hills]
3 of 4 subregionsBroken Hill ComplexNear Threatened
, Data Deficient
Murnpeowie (STP03)Stony PlainsNear Threatened
  [edge of range]
3 of 3 subregionsCentral RangesLeast Concern
Tieyon (FIN03)FinkeLeast Concern
  [likes rocky hills]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Sigesbeckia]
Name derivation:
Sigesbeckia named after Johann Georg Siegesbeck (1686-1755), a German physician, botanist, director of the Botanical Gardens at St Petersburg and pronounced opponent of the Linian system, who named this small-flowered, unpleasant-smelling, grows in mud, weedy genus after him following their bitter rivalry. Australiensis means of or from the south; referring to the distribution of the species in the southern hemisphere.
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.
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.
Fruit type:
Globular fruit with a number of seed segments in terminal clusters.
Seed type:
Blackish slightly angled seed to 3 mm long.
Seed collecting:
Collect fruit that are maturing, turning yellow and fat with hard seeds.
Seed cleaning:
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.