Seeds of South Australia
Pultenaea dentata (Leguminosae)
Clustered Bush-pea
List of species for Pultenaea
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Seed collecting:
November to January
Herbarium regions:
Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
IBRA regions
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU D2)   [localised, grows in wet heath]
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [localised]
Fleurieu (KAN02) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [in Glen Shera CP, hard to find, likes fire; weeds a threat]
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. Dentata from the Latin 'dens' meaning tooth; referring to the tooth-like margin of the bracts.
Distribution:
Found on Kangaroo Island, southern Mount Lofty Ranges and the lower South-east in South Australia, in damp heathland, in swamps and along streams. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Rare in Queensland. Common in the other states.
Plant description:
Lax, open, prostrate or procumbent shrub with branches to 80 cm long and finely ribbed and hairy stems. Leaves alternate, oblanceolate or elliptic, to 12 mm long and 2 mm wide, upper surface glabrous, paler than lower; lower surface glabrous or glabrescent, occasionally slightly wrinkled or scabrous.  Inflorescence terminal clusters with dense bright-yellow with red stripes pea-flowers. Flowering between October and November.
Fruit type:
Sparsely hairy brown ovoid pod to 5 mm long.
Seed type:
Yellow reniform seed to 2 mm long and 1.2 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 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-15100%7 d7 d seed coat nicked with scalpel;
1% agar;
Incubated under spring/autumn conditions
Jul-153%21 dNA
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)