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
SUMMARY
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
DISPLAY ALL
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.
Distribution:
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.
Status:
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.