Seeds of South Australia
Brachyscome parvula (Compositae)
Coast Daisy
List of species for Brachyscome
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Seed collecting:
October to January
Herbarium regions:
Northern Lofty, Murray, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, South Australian Murray-Darling Basin, South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Data Deficient   [no records; AD specimen on loan, not yet databased]
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))
Glenelg Plain (NCP02) 
 Vulnerable   (IUCN: VU B2ab(ii,iii))
Lucindale (NCP03) 
 Near Threatened   [stronghold]
Tintinara (NCP04) 
 Data Deficient   [no records but may occur here]
Fleurieu (KAN02)Kanmantoo
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [limited habitat; weeds a threat]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [limited habitat; weeds a threat]
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. Parvula from the Latin 'parvus' meaning small; alluding to its appearance.
Distribution:
Scattered eastward from the Mount Lofty Ranges to the lower South-east in South Australia, growing on coastal cliffs and saline, marshy ground near the sea, to inland grassland, woodland and forest. Also found in Victoria and Tasmania.
Status:
Native. Rare in South Australia. Common in all the other states. This daisy is endangered in the Adelaide and Mount Lofty Ranges region where it is only known from a couple of small extant populations in the Mt Crawford area. The SA Seed Conservation Centre collected ~700 seeds in 2016 with support from AMLR NRM and has propagated a number of plants for a Seed Production Area in the Adelaide Botanic Gardens with the assistance of Marden College students.
Plant description:
Annual or perennial herb to 40 cm high with erect or ascending, hairless, branching stems. Basal leaves hairless, entire and linear to narrowly oblanceolate or lobed to 7 cm long. Other leaves entire or lobed to 10 cm long, hairless or with sparse glandular hairs. Flowers are small white to lilac daisy. Flowering between September and April.
Fruit type:
Small brown daisy heads.
Seed type:
Dark brown to black pyramid-shaped seed to 1.5 mm long and 0.5 mm wide, with a smooth surface.
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 three collections, the seed viability were average to high, ranging from 50% to 100%.
Seed germination:
This species may have physiological dormancy that needs to be overcome for the seed to germinate. Winter and spring/autumn conditions produce high germination. However, gibberellic acid (250 mg/L) or potassium nitrate (100 mg/L) added to water agar can increase germination.  After-ripening at 45 degrees celsius  for 1 - 2 months or at 15 - 30 degrees celcius for up to 12 months can alleviate dormancy.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA7600 (0.39 g)8-Oct-2006DJD465
South Eastern
1-Aug-2007100%+5°C, -18°C
BGA 
MSB
450 (0.0284 g)
3500
9-May-2006DJD465
South Eastern
1-Aug-200780%-18°C
BGA8100 (0.4277 g)23-Oct-2006MJT006
South Eastern
1-Aug-200750%+5°C, -18°C
TST6711-Jan-2012+5°C, -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
September 201270%7d42d None
1% water agar supplemented with 250 mg/L gibberellic acid
12 hours  /  17.5 °C C constant.
July 201063%14d42d None
1% w/v water agar
Incubated under winter conditions
July 201032%28dNA None
1% w/v water agar
Incubated under spring/autumn conditions
July 201010%28dNA None
1% w/v water 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)