Seeds of South Australia
Pultenaea penna (Leguminosae)
Feather Bush-pea
List of species for Pultenaea
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Seed collecting:
November to January
Herbarium regions:
Kangaroo Island, South Eastern
NRM regions:
Kangaroo Island, South East
IBRA regions
Bridgewater (NCP01)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D1+2)
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU D1+2)   [Gum Lagoon - stronghold]
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))
Kangaroo Island (KAN01)Kanmantoo
 Near Threatened
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. Penna from Latin meaning feather; referring to the long whitish hairs on the apical leaves and bracts.
Distribution:
Found on Kangaroo Island and the South-east in South Australia, growing in heath or mallee heath and less common, in swamps or woodlands, on sand to sandy clay or loam over limestone. Also found in Victoria.
Status:
Native. Rare in South Australia. Rare in Victoria.
Plant description:
Erect to prostrate shrub to 1 m high with branchlets sparsely to moderately hairy. Leaves alternate to 10 mm long and 0.8 mm wide,linear, broadly u-shaped, straight, smooth to tuberculate, glabrous to sparsely hairy, apex
acute, straight, pungent. Inflorescence a tight, terminal cluster of 4–5 yellow to orange with red striation pea-flowers. Flowering between November to December.
Fruit type:
Hairy brown ovoid pod, enclosed by the calyx.
Seed type:
Dark brown with black mottled reniform seed to 2.5 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 dark 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 average, at 75%.
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-1695%7 d14 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)