Seeds of South Australia
Acacia papyrocarpa (Leguminosae)
Western Myall
List of species for Acacia
Display more images
Click on an image to enlarge it
Seed collecting:
December to February
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands
IBRA regions
SUMMARY
Southern Flinders (FLB04)Flinders Lofty Block
 Near Threatened   (Probable Decline)   [edge of range]
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
St Vincent (EYB02)Eyre Yorke Block
 Least Concern   (Probable Decline)   [edge of range, long lived, needs heavy rainfall, grazed by sheep]
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [rare recruitment events, white fly a problem]
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [rare recruitment events, white fly a problem]
Myall Plains (GAW01)Gawler
 Near Threatened   (Probable Decline)   [rare recruitment events & rabbit browsing]
Gawler Volcanics (GAW02) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Gawler Lakes (GAW03) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Arcoona Plateau (GAW04) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Kingoonya (GAW05) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Torrens (GAW06) 
 Rare   (IUCN: RA d(i,ii))   [could be declining; lack of recruitment, white-fly]
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Near Threatened   [could be declining; lack of recruitment, white-fly]
Maralinga (GVD03)Great Victoria Desert
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Tallaringa (GVD05) 
 Near Threatened   [could be declining; lack of recruitment, white-fly]
Yellabinna (GVD06) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Carlisle (NUL01)Nullarbor
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Nullarbor Plain (NUL02) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Yalata (NUL03) 
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Hampton (HAM01)Hampton
 Near Threatened   (Probable Decline)   [rare recruitment events, white fly a problem]
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Near Threatened   [could be declining; lack of recruitment, white-fly]
Peake-Dennison Inlier (STP04) 
 Near Threatened
Baltana (STP07) 
 Near Threatened   [could be declining; lack of recruitment, white-fly]
Tieyon (FIN03)Finke
 Rare   (IUCN: RA d(i,ii))
IBRA regions
DISPLAY ALL
2 of 6 subregionsFlinders Lofty BlockNear Threatened
, Rare
3 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
8 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
3 of 4 subregionsGreat Victoria DesertNear Threatened
3 of 3 subregionsNullarborNear Threatened
Hampton (HAM01)HamptonNear Threatened
  (Probable Decline)   [rare recruitment events, white fly a problem]
4 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
Tieyon (FIN03)FinkeRare
  (IUCN: RA d(i,ii))
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. Papyrocarpa from the Greek 'papyrus' meaning paper-like and 'karpos' meaning fruit.
Distribution:
Found in arid and semi-arid parts of South Australia, in the North-Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Eyre Peninsula and Flinders Ranges regions, growing in low open woodland, tall open-low shrubland in association with Maireana, on sandy loams and calcareous soils. Also found in Western Australia.
Status:
Native. Common in South Australia. Common in Western Australia.
Plant description:
Tall shrubs or small trees to 7 m high, normally multi-stemmed and forming neat rounded, spreading, shady canopies which often appear silvery-green with new growth. Branchlets sometimes drooping, slightly angular, minutely pubescent but becoming terete and glabrous with age, with bark grey, rough, flaky and fissured. Leaves linear to 8 cm long and 3 mm wide, straight or slightly curved, compressed, appressed pubescent, silvery pubescent when young, with numerous fine parallel longitudinal veins; apex terminating in a fine delicately curved point, attenuate towards the base; glands basal. Flower-spike in axillary clusters of 2-6 globular, yellow flower-heads. Flowering between August and November.
Fruit type:
Brown, narrowly oblong pod to 10 cm long and 8 mm wide; flat, leathery, reticulate; scarcely constricted between seeds
Seed type:
Hard, dark brown to black ovoid seed to 6 mm long and 4.5 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 for 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 desiccant 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).