Seeds of South Australia
Brachyscome diversifolia (Compositae)
Tall Daisy
List of species for Brachyscome
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Seed collecting:
October to December
Herbarium regions:
Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South East
IBRA regions
Fleurieu (KAN02)Kanmantoo
 Data Deficient   [1 old record, probably regionally extinct]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Endangered   (IUCN: EN B2ab(i,ii,iii); D)   (Probable Decline)   [limited habitat; needs high quality soils, grassy woodlands; used in planting; has disappeared from Mt Bold]
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 Brachyscome]
Name derivation:
Brachyscome from the Greek 'brachys' meaning short and 'kome' meaning hair, referring to the tuft of short bristles or hairs of the pappus. Diversifolia from the Latin 'diversus' meaning different and 'folium' meaning leaf, referring to the species having different shaped leaves on the same plant.
Distribution:
Found in a few sites in the southern Mount Lofty Ranges in South Australia, growing in forest and along gullies. There is an old collection (1934) from the South-east around Lucindale but this population has not been relocated. Also found in Queensland, New South Wales, Victoria and Tasmania.
Status:
Native. Very rare in South Australia. Common in the other States.
Plant description:
Erect perennial daisy growing to 50 cm tall with hairy serrated basal leaves. Flowers single large white daisy on a long stalk. Flowering between October and November.
Fruit type:
Dried daisy-heads containing numerous seeds.
Seed type:
Rectangular brown seeds to 3.2 mm long and 0.5 mm wide, with short hairs at one end.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect heads that are drying off and turning brown. The hard brown seeds should dislodge easily.
Seed cleaning:
Place the heads in a tray and leave to dry for a week. Then rub the heads gently with your hands 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.
Seed viability:
From three collections, the seed viability was average to high, ranging from 55% to 85%.
Seed germination:
This species has physiological dormancy that need to be overcome for the seed to germinate.
   
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
4670 (1.55 g)
2411
5016-Nov-2006PJA138
Southern Lofty
1-Aug-200755%+5°C, -18°C
BGA2340 (0.7256 g)1-Nov-2006RJB70311
Southern Lofty
1-Aug-200775%+5°C, -18°C
BGA1300 (0.35 g)1024-Nov-2006PJA139
Southern Lofty
Jun-2010-18°C
BGA19800 (9.17 g)3-Nov-2010KHB547
Southern Lofty
1-Jan-201285%+5°C, -18°C
PJA1881-Jan-2012-18°C
PJA1871-Jan-2012
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
Sep-1292%7 d7 d
1% agar with 250 mg/L gibberellic acid;
12/12;  /  23°C
Jul-1084%13 d34 d
1% agar with 250 mg/L gibberellic acid;
Incubated under summer conditions
Jul-1069%13 d34 d
1% agar with 250 mg/L gibberellic acid;
Incubated under spring/autumn conditions
Jul-1066%13 d27 d
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions
Jul-1061%13 d21 d
1% agar with 250 mg/L gibberellic acid;
Incubated under winter conditions
Jul-1060%21 d34 d
1% agar with 10% smoke water;
Incubated under winter conditions
Jul-1056%27 d55 d
1% agar with 100 mg/L potassium nitrate;
Incubated under summer conditions
Jul-1053%13 d34 d
1% agar;
Incubated under winter conditions
Jul-1045%21 dNA
1% agar;
Incubated under summer conditions
Jul-1040%21 dNA
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Jan-0938%14 dNA
1% agar;
Incubated under winter conditions
Jan-0929%28 dNA
1% agar with 250 mg/L gibberellic acid;
Incubated under winter conditions
Jul-1029%21 dNA
1% agar with 10% smoke water;
Incubated under summer conditions
Jul-1026%13 dNA
1% agar;
Incubated under spring/autumn conditions
Jul-1013%21 dNA
1% agar with 10% smoke water;
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)