Seeds of South Australia
Eriocaulon carsonii ssp. carsonii (Eriocaulaceae)
Salt Pipewort
List of species for Eriocaulon
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Seed collecting:
May to October
Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA regions
Northern Flinders (FLB05)Flinders Lofty Block
 Endangered   (IUCN: EN D)   [clonal spp; very limited habitat, in mound springs]
Murnpeowie (STP03)Stony Plains
 Vulnerable   (IUCN: VU D2)   [clonal spp; very limited habitat, in mound springs]
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 Eriocaulon]
Name derivation:
Eriocaulon from the Greek 'erion' meaning wool and 'kaulos' meaning stem; alluding to the scapes of some species. Carsonii named after Duncan Carson (1860-1931), a woolbroker and pastoralist.
Found around hot-springs in the Lake Eyre region in South Australia. Also found in Queensland and New South Wales.
Native. Very rare in South Australia. Very rare in the other states.
Plant description:
Small mat forming succulent herb to 6 cm tall. Leaf blade with obvious square air sack. Flowers single round ball on a long stalk appearing in winter and spring.
Fruit type:
Round fruit heads less than 1cm long, usually turning brown as it matures.
Seed type:
Very small yellow to orange ovoid seeds to 0.8 mm long and 0.5 mm wide, smooth and shiny.
Embryo type:
Seed collecting:
Carefully pick the browning fruit heads by hand. These will have mature seeds which are hard and yellow-orange.
Seed cleaning:
Place the fruit heads in a tray and leave to dry for a week. Then gently rub the heads by hand. Use a fine sieve to separate the unwanted material. Be carefully which part you discard as the seeds are very small and will probably fall through your sieve. 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 three collections, the seed viability were high, ranging from 95% to100%.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
May-0924%28 dNA 2% calcium hypochlorite solution 30 min
1% agar;
Incubated under spring/autumn conditions
May-098%28 dNA
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Jun-086%31 dNA
filter paper over moist sand;
Incubated under spring/autumn conditions
1% agar with 250 mg/L gibberellic acid (pH 6.5);
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)