Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
Display IBRA region text
| Northern Flinders (FLB05) | Flinders Lofty Block | Rare (IUCN: RA d(ii)) [edge of range; almost SA endemic; sparse distribution] |
| Arcoona Plateau (GAW04) | Gawler | Rare (IUCN: RA d(i,ii)) [edge of range] |
| Torrens (GAW06) | | Rare (IUCN: RA d(ii)) |
| Roxby (GAW07) | | Rare (IUCN: RA d(ii)) |
| Dieri (SSD03) | Simpson Strzelecki Dunefields | Near Threatened |
| Warriner (SSD04) | | Rare (IUCN: RA d(ii)) |
| Strzelecki Desert (SSD05) | | Rare (IUCN: RA d(ii)) |
| Breakaways (STP01) | Stony Plains | Rare (IUCN: RA d(ii)) |
| Oodnadatta (STP02) | | Rare (IUCN: RA d(ii)) |
| Murnpeowie (STP03) | | Rare (IUCN: RA d(ii)) |
| Peake-Dennison Inlier (STP04) | | Rare (IUCN: RA d(ii)) |
| Macumba (STP05) | | Rare (IUCN: RA d(ii)) |
| Witjira (STP06) | | Near Threatened |
| Baltana (STP07) | | Rare (IUCN: RA d(ii)) |
| Sturt Stony Desert (CHC02) | Channel Country | Rare (IUCN: RA d(ii)) |
| Northern Flinders (FLB05) | Flinders Lofty Block | Rare (IUCN: RA d(ii)) [edge of range; almost SA endemic; sparse distribution] |
| 3 of 8 subregions | Gawler | Rare |
| 3 of 4 subregions | Simpson Strzelecki Dunefields | Near Threatened , Rare |
| 7 of 7 subregions | Stony Plains | Near Threatened , Rare |
| Sturt Stony Desert (CHC02) | Channel Country | Rare (IUCN: RA d(ii)) |
Etymology
Atriplex from the Latin 'atriplexum' meaning an orach, a saltbush, an Ancient Latin name for this plant. Incrassata from Latin 'incrassatus' meaning thickened, referring to the thickened fruit base.
Distribution and status
Found mainly in South Australia, north of Lake Torrens. Also found in Northern Territory and Queensland. Native. Common in South Australia. Rare in other states.
Herbarium regions: Lake Eyre, Gairdner-Torrens, Flinders Ranges
NRM region: South Australian Arid Lands
AVH map: SA distribution map (external link)
Plant description
Intricately branched shrub to 1m high. Leaves ovate-deltoid, sinuate-dentate; truncate or slightly cuneate at the base, with a thin scaly covering on both surfaces, with the lamina to 20mm long. Male flowers in disjunct or continuous glomerules to 5mm wide and forming slender spikes or panicles. Female flowers in dense disjunct glomerules arranged in open leafy panicles. Fruits are pale brown papery fruit to 10mm long and wide, with valves smooth, entire or bluntly denticulate; free to near the base, hard, ultimately thickened and convex except for the papery reflexed margin. Seeds are brown reniform seed to 3mm long and 2mm wide. Seed embryo type is peripheral.
Seed collection and propagation
Collect seeds between June and August. Collect fruits that are starting to turn pale brown, drying off and papery. Fruits can be collected directly from the bush or from the ground underneath. Place the fruits in a tray and leave to dry for one to two weeks. No cleaning is required if only the fruits are collected. The seed can be stored in the fruit or can be clean further. Rub the fruit 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.
| Location | No. of seeds
(weight grams) | Number
of plants | Date
collected | Collection number
Collection location | Date
stored | % Viability | Storage
temperature | BGA
MSB | 4,100 (77.5 g)
4,100 (77.5 g) | 30+ | 9-Sep-2013 | DJD2745
Gairdner-Torrens | 24-Mar-2015 | 60% | -18°C |
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.
Germination table:
Display
| Date | Result | T0 | T50 | Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod |
| Sep-14 | 60% | 7 | 50 |
500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under spring/autumn conditions |
| Sep-14 | 8% | 13 | NA |
1% agar;
Incubated under spring/autumn conditions |
| Sep-14 | 4% | 43 | NA |
leached in water 3 d;
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)
