Seeds of South Australia
Pultenaea densifolia (Leguminosae)
Dense Bush-pea
List of species for Pultenaea
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Seed collecting:
November to January
Herbarium regions:
Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Lucindale (NCP03)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))   [edge of range; Desert Camp ]
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [edge of range; quality of habitat declining]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Endangered   (IUCN: EN D)   [1 record from Rowland Flat, only known pop. Checked by P Lang]
Broughton (FLB02) 
 Endangered   (IUCN: EN D)   [small pop]
Southern Yorke (EYB01)Eyre Yorke Block
 Rare   (IUCN: RA d(i))   [localised]
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(i,ii))
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(i,ii))
Murray Mallee (MDD02)Murray Darling Depression
 Near Threatened   [limited habitat]
Murray Lakes and Coorong (MDD03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [edge of range]
Lowan Mallee (MDD04) 
 Least Concern
IBRA regions
DISPLAY ALL
2 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Rare
2 of 2 subregionsKanmantooRare
2 of 6 subregionsFlinders Lofty BlockEndangered
4 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
3 of 6 subregionsMurray Darling DepressionLeast Concern
, Near Threatened
, Vulnerable
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. Densifolia from Latin meaning having dense foliage.
Distribution:
Found in the southern part of South Australia, from the Eyre Peninsula to the upper South-east, growing in dry sclerophyll woodland, heath and mallee. Also found in Victoria.
Status:
Native. Common in South Australia. Rare in Victoria.
Plant description:
Rigid diffuse or divaricate shrub to 50 cm high with terete stems covered with white woolly hairs, often largely obscured by stipules. Leaves broadly ovate, to 3 mm long and 2 mm wide, strongly recurved, apex acute, surfaces glabrous, the lower with prominent raised veins, slightly paler than upper. Flowers axillary clustered towards tips of branches with yellow-red pea-flowers. Flowering between September and November.
Fruit type:
Hairy brown ovoid pod.
Seed type:
Brown with black mottled reniform seed to 2 mm long and 1.5 mm wide, with a cream aril.
Embryo type:
Bent.
Seed collecting:
Collect maturing pods, those that are brown or turning brown and contain hard seeds inside. 
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 viability:
From one collection, the seed viability was high, at 95%.
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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Jul-1696%7 d7 d seed coat nicked with scalpel, leached in water 24 h;
1% agar;
Incubated under spring/autumn conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)