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.
Distribution:
Found around hot-springs in the Lake Eyre region in South Australia. Also found in Queensland and New South Wales.
Status:
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:
Broad.
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 200924%28dNA Surface sterilised in 2% CaOCl solution (30mins).
1% water agar.
Incubated under spring/autumn conditions
May 20098%28dNA Surface sterilised in 2% CaOCl solution (30mins).
1% water agar supplemented with 100mg/L KNO3.
Incubated under spring/autumn conditions
June 20086%31dNA None.
Filter paper placed over wet sand.
Incubated under spring/autumn conditions
May 20090%NANA Surface sterilised in 2% CaOCl solution (30mins).
1% water agar supplemented with 250mg/L GA3.
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)