Seeds of South Australia
Vittadinia megacephala (Compositae)
Large-head New Holland Daisy
List of species for Vittadinia
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Herbarium regions:
Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Lucindale (NCP03)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)   (Probable Decline)   [highly localised, Desert Camp]
Tintinara (NCP04) 
 Vulnerable   (IUCN: VU D2)
Fleurieu (KAN02)Kanmantoo
 Near Threatened   [mostly on eastern edge]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [weeds a threat]
Broughton (FLB02) 
 Least Concern
Olary Spur (FLB03) 
 Least Concern   [edge of range]
Southern Flinders (FLB04) 
 Least Concern   [edge of range]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   (Probable Decline)
St Vincent (EYB02) 
 Least Concern
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Murray Mallee (MDD02) 
 Least Concern
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [distinctive spp.]
Murray Scroll Belt (RIV06)Riverina
 Least Concern   [only on cliffs; limited habitat]
Yalata (NUL03)Nullarbor
 Rare   (IUCN: RA d(ii))
IBRA regions
DISPLAY ALL
2 of 4 subregionsNaracoorte Coastal PlainVulnerable
Fleurieu (KAN02)KanmantooNear Threatened
  [mostly on eastern edge]
4 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
3 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
Murray Scroll Belt (RIV06)RiverinaLeast Concern
  [only on cliffs; limited habitat]
Yalata (NUL03)NullarborRare
  (IUCN: RA d(ii))
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 Vittadinia]
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA13000 (24.08 g)5024-Oct-2007RJB75059
Northern Lofty
19-Sep-200885%-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:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Oct-1382%7 d7 d
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under winter conditions
Oct-1378%7 d7 d
1% agar;
Incubated under winter conditions
Oct-1376%7 d7 d
1% agar;
Incubated under spring/autumn conditions
Oct-1358%7 d7 d
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under spring/autumn conditions
Oct-1356%7 d14 d
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under summer conditions
Oct-1348%7 dNA
1% agar;
Incubated under summer 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)