Nullarbor Daisy,
Tate's Daisy
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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
| Nullarbor Plain (NUL02) | Nullarbor | Rare (IUCN: RA d(i,ii)) |
| Hampton (HAM01) | Hampton | Rare (IUCN: RA d(i,ii)) |
Botanical art
Kath Alcock paintings: 2
Prior names
Brachycome tatei
Common names
Nullarbor Daisy
Tate's Daisy
Etymology
Brachyscome from the Greek 'brachys' meaning short and 'kome' meaning hair, referring to the tuft of short bristles or hairs of the pappus. Tatei named after Ralph Tate (1840-1901), a geologist and the first Professor of Natural History at the University of Adelaide.
Distribution and status
Found along the the limestone cliffs of the Great Australian Bight from Fowler's bay in South Australia to Eucla in Western Australia. Native. Rare in South Australia. Rare in Western Australia.
Herbarium region: Nullarbor
NRM region: Alinytjara Wilurara
AVH map: SA distribution map (external link)
Plant description
A decumbent and branching perennial herb usually forming compact clumps with thick fleshy leaves. Flowers are white daisies displayed above the foliage. Flowering throughout the year. Fruits are brown daisy-head to 1 cm across containing numerous brown seeds. Seeds are flat ovoid brown seeds to 2 mm long and 1.3 mm wide, with few hairs and a serrated margin. Seed embryo type is spatulate fully developed.
Seed collection and propagation
Collect seeds between January and December. Pick heads that are maturing, drying off, with brown seeds that dislodge easily. Place the seed-heads in a tray and leave to dry for a week. Then gently rub the heads 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. From one collection, the seed viability was high, at 95%. This species may have physiological dormancy that needs to be overcome for the seed to germinate.
| Location | No. of seeds
(weight grams) | Number
of plants | Date
collected | Collection number
Collection location | Date
stored | % Viability | Storage
temperature | | BGA | 2,300 (0.53 g) | 5 | 9-Sep-2008 | HPV3689
Nullarbor | 1-Jun-2010 | 95% | +5°C, -18°C |
BGA
MSB | 3,600 (0.46 g)
2,200 (0.3 g) | | 20-Dec-2007 | PJA166
Nullarbor | 1-Jan-2012 | 100% | -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 |
| Aug-10 | 91% | 7 | 14 |
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions |
| Aug-10 | 91% | 7 | 14 |
1% agar;
Incubated under winter conditions |
| Aug-10 | 89% | 7 | 14 |
1% agar with 250 mg/L gibberellic acid;
Incubated under winter conditions |
| Aug-10 | 86% | 7 | 14 |
1% agar with 10% smoke water;
Incubated under winter conditions |
| Jan-09 | 83% | 7 | 14 |
1% agar;
Incubated under winter conditions |
| Aug-10 | 80% | 7 | 14 |
1% agar with 250 mg/L gibberellic acid;
Incubated under spring/autumn conditions |
| Aug-10 | 80% | 7 | 14 |
1% agar;
Incubated under spring/autumn conditions |
| Aug-10 | 77% | 7 | 28 |
1% agar with 250 mg/L gibberellic acid;
Incubated under summer conditions |
| Aug-10 | 75% | 7 | 14 |
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions |
| Aug-10 | 69% | 7 | 28 |
1% agar;
Incubated under summer conditions |
| Aug-10 | 55% | 7 | 35 |
1% agar with 100 mg/L potassium nitrate;
Incubated under summer conditions |
| Aug-10 | 53% | 7 | 42 |
1% agar with 10% smoke water;
Incubated under summer conditions |
| Aug-10 | 50% | 7 | 49 |
1% agar with 10% smoke water;
Incubated under spring/autumn conditions |
| Jan-09 | 6% | 21 | NA |
1% agar with 250 mg/L gibberellic acid;
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)
