Seeds of South Australia
Vittadinia australasica var. australasica (Compositae)
New Holland Daisy
List of species for Vittadinia
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Seed collecting:
November
Herbarium regions:
Nullarbor, Flinders Ranges, Eyre Peninsula, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Least Concern
Glenelg Plain (NCP02) 
 Near Threatened   (Probable Decline)
Lucindale (NCP03) 
 Least Concern
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Near Threatened   [on roadsides, likes disturbed ground]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Near Threatened   [on roadsides, likes disturbed ground]
Broughton (FLB02) 
 Least Concern
Olary Spur (FLB03) 
 Data Deficient
Southern Flinders (FLB04) 
 Data Deficient
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   (Probable Decline)
St Vincent (EYB02) 
 Near Threatened   (Probable Decline)
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [restricted habitat]
Murray Mallee (MDD02) 
 Least Concern
Murray Lakes and Coorong (MDD03) 
 Least Concern
Lowan Mallee (MDD04) 
 Least Concern
Wimmera (MDD05) 
 Least Concern
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))
Yalata (NUL03)Nullarbor
 Rare   (IUCN: RA d(ii))
IBRA regions
DISPLAY ALL
4 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Near Threatened
2 of 2 subregionsKanmantooLeast Concern
, Near Threatened
4 of 6 subregionsFlinders Lofty BlockLeast Concern
, Near Threatened
, Data Deficient
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Near Threatened
5 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
Myall Plains (GAW01)GawlerRare
  (IUCN: RA d(ii))
Yellabinna (GVD06)Great Victoria DesertRare
  (IUCN: RA d(i,ii))
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]
Name derivation:
Vittadinia named after Carlo Vittadini (1800-1865}, an Italian doctor and mycologist, author of several important works on Italian mushroom species. Australasica means of or from Australasia; referring to the species distribution. 
Distribution:
Found in the southern part of South Australia, growing on sandy soils in a variety of habitats including woodland, mallee and cleared ground. Also found in Western Australia and Victoria.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Annual or short-lived perennial herb to 30 cm high with leaves and stems covered in glandular hairs, often sticky. Leaves oblanceo-late to narrowly obovate, to 30 mm long and 8 mm wide, entire or with 1 or 2 pairs of small teeth above midway, apex obtuse to acute, often recurved. Ray florets mauve to white. Flowering between September and November.
Fruit type:
Large fluffy creamy daisy head.
Seed type:
Yellow semi-flat long ovoid seed to 4.5 mm long and 1 mm wide, surface with parallel striation and hairs and pappus as long as seed.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect heads that are fluffy. Either pick off the whole heads or use your finger and pull off the seeds from the head. Mature seeds will come off easily.
Seed cleaning:
Place the heads in a tray for a week to dry. No cleaning is required if only pure seeds are collected. If heads are collected, then rub the heads gently with your hands to dislodge the seeds. Viable seeds will be fat and hard. 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.
Seed viability:
From one collection, the seed viability was high, at 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily without any treatment.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Jul-16100%7 d7 d 500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under spring/autumn conditions
Jul-1697%7 d14 d 500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under winter conditions
Jul-1697%7 d7 d leached in water 24 h;
1% agar;
Incubated under spring/autumn conditions
Jul-1697%7 d14 d leached in water 24 h;
1% agar;
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)