Seeds of South Australia
Acacia wilhelmiana (Leguminosae)
Wilhelm's Wattle
List of species for Acacia
Display more images
Click on an image to enlarge it
Seed collecting:
November to December
Herbarium regions:
Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Murray
NRM regions:
Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Fleurieu (KAN02)Kanmantoo
 Vulnerable   (IUCN: VU D2)
Broughton (FLB02)Flinders Lofty Block
 Least Concern   [Outlier from Murray Mallee region. Taxonomic issues]
Olary Spur (FLB03) 
 Least Concern   [Taxonomic issues. Possibly sth & central flinders will become new sub species. ]
Southern Flinders (FLB04) 
 Least Concern   [Mambray Creek, Alligator Gorge, could be separate taxa]
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(i,ii))   [restricted to Wilpena Pound]
St Vincent (EYB02)Eyre Yorke Block
 Endangered   (IUCN: EN D)   [Should be surveyed. Could be EN]
Eyre Hills (EYB03) 
 Least Concern   [taxonomic issues]
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))   [taxonomic issues]
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))   [taxonomic issues]
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Least Concern
Lowan Mallee (MDD04) 
 Least Concern
Braemer (MDD07) 
 Least Concern   [Outlier from Murray Mallee region. Taxonomic issues]
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(ii))   [edge of range]
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   [taxonomic issues]
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(ii))
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
IBRA regions
DISPLAY ALL
Fleurieu (KAN02)KanmantooVulnerable
  (IUCN: VU D2)
4 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
4 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
, Endangered
4 of 6 subregionsMurray Darling DepressionLeast Concern
Murray Scroll Belt (RIV06)RiverinaRare
  (IUCN: RA d(ii))   [edge of range]
3 of 8 subregionsGawlerRare
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 Acacia]
Name derivation:
Acacia from the Greek 'akakia' and derived from 'ake' or 'akis' meaning a sharp point or thorn and 'akazo' meaning to sharpen. Dioscorides, the Greek physician and botanist used the word in the 1st century AD for the Egyptian thorn tree, Acacia arabica. Wilhelmiana named in honour of Carl Wilhelmi who was the acting Director of the Royal Botanic Gardens in Melbourne.
Distribution:
Occurs in open-scrub mallee vegetation from Eyre Peninsula eastwards to the Flinders Ranges, northern Mount Lofty Ranges and Murray region, . Also found in New South Wales and Victoria.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Dense compact rounded, spreading, viscid shrubs to 3 m high. Leaves linear, flat or sub-terete, oblong-cuneate to 3 cm long and 4 mm wide. Inflorescences axillary and solitary, or twin sometimes on a very short common peduncle with globular, yellow flower-heads. Flowering between August and October.
Fruit type:
Long, curved, brown pod to 6 cm long.
Seed type:
Dark brown, oblong to elliptic seeds to 4 mm long and 2 mm wide.
Embryo type:
Investing.
Seed collecting:
Collect mature pods that are turning brown, with hard, dark seeds inside.
Seed cleaning:
Place the pods in a tray and leave to dry fro 1-2 weeks or until the pods begin to split. Then rub the dried pods to dislodge the seeds. Use a sieve to separate any unwanted material. Store the seeds with a desicant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.
Seed germination:
This species has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat).