Seeds of South Australia
Brachyscome campylocarpa (Compositae)
Large White Daisy
List of species for Brachyscome
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Seed collecting:
October to December
Herbarium regions:
Lake Eyre, Flinders Ranges
NRM region:
South Australian Arid Lands
IBRA regions
Dieri (SSD03)Simpson Strzelecki Dunefields
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Diamantina-Eyre (CHC04) 
 Least Concern   [undercollected]
Coongie (CHC06) 
 Least Concern   [undercollected]
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. Campylocarpa from the Greek 'capylos' meaning curved, bent and 'carpos' meaning fruit; alluding to its bent fruit.
Distribution:
Found in the central and northern parts of South Australia, in depressions between sand dunes and on flood plains. Also found in Queensland.
Status:
Native. Common in South Australia. Uncommon in Queensland.
Plant description:
Branching annual herb to 40 cm high with hairless and relatively thick stems. Basal leaves are pinnate or entire. Stem leaves are pinnate to 11 cm long and reducing in size up the stem. Large daisy with white ray florets. Flowering between August and September.
Fruit type:
Large brown daisy heads.
Seed type:
Black wedge-shaped curved seed to 3 mm long and 1.5 mm wide, with lobed margins and dense hairs at one end and scattered hairs along the margin. 
Embryo type:
Spatulate fully developed.
Seed collecting:
Pick heads that are maturing, drying off, with brown seeds that dislodge easily.
Seed cleaning:
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.
Seed viability:
From one collection, the seed viability was high to high, at 80%.
Seed germination:
This species has physiological dormancy that needs to be overcome for the seed to germinate. Winter conditions produce high germination. Germination is increased with 250 mg/L gibberellic acid added to water agar. Dormancy can be alleviated with after-ripening at 30 oC or stratification at 15 oC
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
16000 (7.1 g)
32000 (14.2 g)
200+22-Oct-2007MJT147
Lake Eyre
Jun-201080%-18°C
MJT1911-Jan-2012-18°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
January 201273%7d14d 12 months after-ripening at 30 °C C/30% relative humidity
1% water agar
Incubated under spring/autumn conditions
June 201060%7d21d None
1%w/v agar supplemented with 250 mg/L gibberellic acid
Incubated under winter conditions
June 201045%7dNA None
1%w/v agar
Incubated under winter conditions
June 201016%28dNA None
1%w/v agar
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)