Seeds of South Australia
Pultenaea acerosa (Leguminosae)
Bristly Bush-pea
List of species for Pultenaea
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Seed collecting:
October to January
Herbarium regions:
Eyre Peninsula, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, South Australian Murray-Darling Basin, South East
IBRA regions
Bridgewater (NCP01)Naracoorte Coastal Plain
 Near Threatened
Lucindale (NCP03) 
 Near Threatened
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Least Concern
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(i,ii))
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Lowan Mallee (MDD04) 
 Rare   (IUCN: RA d(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 Pultenaea]
Name derivation:
Pultenaea named after Richard Pulteney (1730 – 1801), an English physician, botanist and biographer of Carl Linnaeus. Acerosa from the Latin 'acer' meaning sharp; referring to the needle-like leaves.
Distribution:
Found in the southern part of South Australia, from the Eyre Peninsula to the South-east, growing in dry sclerophyll woodland and mallee. Also found in Victoria.
Status:
Native. Common in South Australia. Rare in Victoria.
Plant description:
Small rigid, much-branched shrub to 60 cm high with terete stems covered in white woolly hairs. Leaves alternate, linear-terete, to 10 mm long, tapering into a strong pungent point, grooved on upper surface, sometimes pubescent at first, later glabrous. Inflorescence clusters of 5–10 yellow, orange or red pea-flowers at the tips of branches. Flowering between August and December.
Fruit type:
Hairy brown ovoid pod to 4 mm long.
Seed type:
Yellowish-brown with black mottled reniform seed to 2 mm long and 1.3 mm wide, with a cream aril.
Embryo type:
Bent.
Seed collecting:
Collect maturing pods, those that are brown or turning brown and contain hard black seeds inside. Plant is prickly so it is advisable to wear gloves.
Seed cleaning:
Place the pods in a paper bag and leave to dry for one to two weeks. Then rub the pods with a rubber bung to dislodge the seeds. Use a sieve to separate the 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. The seed coat needs to be ruptured so that water can enter the seed before germination can occur. Methods to rupture the seed coat include scarification with sand paper or nicking the seed coat with a sharp blade or hot water treatment by immersion in boiling water.