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 short bristles or hairs of the pappus. Diversifolia from the Latin 'diversus' meaning different and 'folium' meaning leaf; referring to the species having different shapes 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 were 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
September 201292%7d7d None
1% water agar supplemented with 250 mg/L gibberellic acid
12 hours  /  constant 23 °C C.
July 201084%13d34d None.
1% water agar supplemented with 250mg/L GA3.
Incubated under summer conditions
July 201069%13d34d None.
1% water agar supplemented with 250mg/L GA3.
Incubated under spring/autumn conditions
July 201066%13d27d None.
1% water agar supplemented with 100mg/L KNO3.
Incubated under winter conditions
July 201061%13d21d None.
1% water agar supplemented with 250mg/L GA3.
Incubated under winter conditions
July 201060%21d34d None.
1% water agar supplemented with 10% smoke water.
Incubated under winter conditions
July 201056%27d55d None.
1% water agar supplemented with 100mg/L KNO3.
Incubated under summer conditions
July 201053%13d34d None.
1% water agar.
Incubated under winter conditions
July 201045%21dNA None.
1% water agar.
Incubated under summer conditions
January 200944%14dNA Seeds surface sterilised with 1% NaOCl
1% water agar.
Incubated under winter conditions
July 201040%21dNA None.
1% water agar supplemented with 100mg/L KNO3.
Incubated under spring/autumn conditions
January 200938%14dNA None.
1% water agar.
Incubated under winter conditions
January 200929%28dNA None.
1% water agar supplemented with 250mg/L GA3.
Incubated under winter conditions
July 201029%21dNA None.
1% water agar supplemented with 10% smoke water.
Incubated under summer conditions
July 201026%13dNA None.
1% water agar.
Incubated under spring/autumn conditions
July 201013%21dNA None.
1% water agar supplemented 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)