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.
Distribution:
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. 
Status:
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)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
2380 (4.522 g)
2630 (5 g)
~402-Mar-2005DJD 120
Southern Lofty
28-Mar-2006100%-18°C
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.