Seeds of South Australia
Calandrinia stagnensis (Portulacaceae)
Waterhole Purslane
List of species for Calandrinia
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Seed collecting:
January to December
Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA regions
Macumba (STP05)Stony Plains
 Data Deficient   [query ID]
Sturt Stony Desert (CHC02)Channel Country
 Data Deficient   [check ID]
Coongie (CHC06) 
 Rare   (IUCN: RA d(ii))
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 Calandrinia]
Name derivation:
Calandrinia named after Jean-Louis Calandrini (1703-1758), a Swiss scientist, professor of mathematics and philosophy. Stagnensis from the Latin 'stagnum' meaning pool, waterhole, referring to the location of the type collection from Ross's Waterhole, Macumba River. 
Found in the north and north-eastern parts of South Australia, growing on temporary freshwater or somewhat saline swamps and claypans and immediate fringes, Chenopod-rich plains, and intermittent watercourses and run-on areas. Also found in Western Australia, Northern Territory and Queensland.
Native. Uncommon in South Australia. Common in the other states.
Plant description:
Prostrate to decumbent annual herb with stems to 10 cm long. Leaves basal and on flower depending on rain.
Fruit type:
Brown ovoid capsule to 3.5 mm long with 4-valves, exceeding the spreading sepals.
Seed type:
Shiny red-brown reniform seed to 0.4 mm long and 0.3 mm wide, with a smooth surface.
Embryo type:
Seed collecting:
Collect mature capsules that are turning  brown and contain dark seeds.
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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
1% agar;
Incubated under spring/autumn conditions
1% agar;
Incubated under winter 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)