Seeds of South Australia
Patersonia occidentalis (Iridaceae)
Long Purple-flag
List of species for Patersonia
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Seed collecting:
December to March
Herbarium regions:
Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Rare   (IUCN: RA d(i,ii))
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Near Threatened   [T Horn has more records]
Lucindale (NCP03) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [limited habitat]
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [only a few known pops on south coast; needs wet/moist sandy habitat]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [habitat loss, drying out, roadsides - threats]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [habitat loss, drying out - threats]
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 Patersonia]
Name derivation:
Patersonia named after William Paterson (1755-1810), an early botanical collector in Australia and Lieutenant Governor of New South Wales from 1800-1810. Occidentalis  from the Latin 'occidens' meaning of the west; referring to the location of where the type specimen was collected, from Western Australia.
Found on Kangaroo Island, southern Mount Lofty Ranges and the lower South-east in South Australia, growing in heath and in clearings within scrub and woodland on poorly drained sites. Also found in Western Australia, Victoria and Tasmania. 
Native. Rare in South Australia. Common in the other states.
Plant description:
Tufted herb to 70 cm high forming clumps or large colonies. Leaves in fan-shaped clusters of 4-10, linear, to 55 cm long and 10 mm wide, glabrous, except margin sometimes with brown hairs. Inflorescence a single blue-violet flower at the terminal of a stalk that is longer than the leaves. Flowering between October and December.
Fruit type:
Long brown cylindrical capsule to 2.5 cm long.
Seed type:
Brown compressed-ovoid seed to 3 mm long and 1.2 mm wide.
Embryo type:
Linear under-developed.
Seed collecting:
Collect mature capsules, those that are drying off and turning brown with hard brown seeds inside.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules gently by hand 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 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
2380 (4.522 g)
2630 (5 g)
~402-Mar-2005DJD 120
Southern Lofty
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.