Seeds of South Australia
Glinus oppositifolius (Aizoaceae)
Slender Carpet-weed
List of species for Glinus
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Seed collecting:
April to August
Herbarium regions:
North Western, Lake Eyre, Eastern, Murray
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
Tallaringa (GVD05)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))   [naturally rare, restricted to larger water holes]
Curnamona (BHC06)Broken Hill Complex
 Vulnerable   (IUCN: VU D2)   [undercollected, ephemeral]
Macumba (STP05)Stony Plains
 Rare   (IUCN: RA d(i,ii))   [naturally rare, restricted to larger water holes]
Witjira (STP06) 
 Rare   (IUCN: RA d(i,ii))   [naturally rare, restricted to larger water holes]
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(i,ii))   [naturally rare, restricted to larger water holes]
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 Glinus]
Name derivation:
Glinus from the Greek 'glinos' meaning a plant with sweet sap; may have been a reference to maple. Oppositifolius from the Latin 'oppositus' meaning standing against or opposed and 'folium' meaning a leaf; referring to the leaves arranged opposite each other.
Distribution:
Found in three disjunct locations in South Australia, in the far north, eastern and Murray River, growing in beds of ephemeral watercourses. Also found in all mainland states.
Status:
Native. Uncommon in South Australia. Common in the other states.
Plant description:
Prostrate annual to 50 cm in diameter. Leaves opposite and/or alternate, obovate to oblanceolate, to 30 mm long, glabrous. Flowers in leaf-opposed clusters of 3-6, perianth-segments to 5 mm long, white or pinkish inside. Flowering between January and July.
Fruit type:
Brown capsules enclosed in the perianth with 3-valves.
Seed type:
Brown reinform seed to 0.5 mm long and 0.4 mm wide, with tuberculated surface.
Embryo type:
Peripheral.
Seed collecting:
Collect capsules that are maturing, turning brown and contain 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. Be careful as the seeds are very small. 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 germination:
This species has physiological dormancy and can be difficult to germinate.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
June 20124%13dNA None
70mm glass petri dishes on 1% w/v agar supplemented with 250mg Gibberellic acid (pH adjusted to 6.5)
Incubated under spring/autumn conditions
June 20122%20dNA None
70mm glass petri dishes on 1% w/v agar supplemented with 100mg/L Potassium Nitrate
Incubated under spring/autumn conditions
June 20120%NANA None
70mm glass petri dishes on 1% w/v agar
Incubated under winter conditions
June 20120%NANA None
70mm glass petri dishes on 1% w/v agar supplemented with 250mg/L Gibberellic acid (pH adjusted to 6.5)
Incubated under winter conditions
June 20120%NANA None
70mm glass petri dishes on 1% w/v agar supplemented with 100mg/L Potassium Nitrate
Incubated under winter conditions
June 20130%NANA None
70mm glass petri dishes on 1% w/v 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)