Seeds of South Australia
Westringia dampieri (Labiatae)
Shore Rosemary
List of species for Westringia
Display more images
Click on an image to enlarge it
Seed collecting:
September to November
Herbarium regions:
Eyre Peninsula, Kangaroo Island
NRM regions:
Eyre Peninsula, Kangaroo Island
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Regionally Extinct   [1 old record from Kingscote; presumed extinct]
Eyre Hills (EYB03)Eyre Yorke Block
 Near Threatened   (Probable Decline)
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
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 Westringia]
Name derivation:
Westringia named after Dr Johan Peter Westring (1753-1783), a Swedish physician and writer on lichens. Dampieri named after William Dampier (1651-1715), 18th century englishman who collected Australian plants which are still preserved in the British Museum at Oxford.
Distribution:
Found along the west coast of the Eyre Peninsula in South Australia, growing in coastal situations on beach sands, sand dunes or limestone cliffs, and on small off-shore islands. Also found in Western Australia.
Status:
Native. Uncommon in South Australia. Common in Western Australia.
Plant description:
Dense shrubs to 1.3 m high with triangular to quadrangular or subterete branches, smooth and covered in dense hairs. Leaves in whorls of 3 or 4 rarely 5, narrowly ovate to narrowly oblong to linear, to 40 mm lonh and 3 mm wide, base cuneate, margin entire and recurved, densely hairy. Flowers tubular, white with purple, red, yellow and/or brown dots surface of tube and mouth, or pale-purple, pale-mauve to lilac with dots absent. Flowering throughout the year.
Fruit type:
Dark brown woody capsule to 2.5 mm long, with four segments.
Seed type:
Brown ovoid seed to 3 mm long and 2 mm wide, with a large plug on one side.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect capsules that are fat and turning brown. A lot of time will be required to collect sufficient amount of seeds.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules gently 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:
Seed viability tend to be very low in this species and good seed set will depend on good season. From one collection, the seed viability was low, at 35%.
Seed germination:
This species has physiological dormancy that needs to be overcome for the seed to germinate.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Aug-1570%7 d14 d
1% agar;
Incubated under spring/autumn conditions
Aug-1526%14 dNA 30% hydrogen peroxide 10 min, water rinse;
1% agar;
Incubated under spring/autumn conditions
Aug-1523%7 dNA 500 mg/L gibberellic acid 48 h;
1% agar;
Incubated under spring/autumn conditions
Aug-153%42 dNA 30% hydrogen peroxide 10 min, dry heat 80°C oven 10 min, 10% smoke 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)