Seeds of South Australia
Brachyscome perpusilla (Compositae)
Rayless Daisy
List of species for Brachyscome
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Seed collecting:
September to December
Herbarium regions:
Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, 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
 Rare   (IUCN: RA d(i,ii))
Glenelg Plain (NCP02) 
 Vulnerable   (IUCN: VU D2)
Lucindale (NCP03) 
 Least Concern
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(i,ii))   [1 pop is within a reserve]
Fleurieu (KAN02) 
 Least Concern
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Broughton (FLB02) 
 Least Concern
Olary Spur (FLB03) 
 Data Deficient
Southern Flinders (FLB04) 
 Data Deficient
Northern Flinders (FLB05) 
 Near Threatened   [northern edge of range; grows rocky outcrops; undercollected]
Central Flinders (FLB06) 
 Near Threatened   [northern edge of range; grows rocky outcrops; undercollected]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   [Very tiny 1-2 cm, probably under collected]
St Vincent (EYB02) 
 Data Deficient
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern   [comes & goes; under-recorded]
Murray Lakes and Coorong (MDD03) 
 Near Threatened   (Probable Decline)
Lowan Mallee (MDD04) 
 Least Concern   [comes & goes; under-recorded]
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU D2)
Braemer (MDD07) 
 Data Deficient
Myall Plains (GAW01)Gawler
 Least Concern
Gawler Volcanics (GAW02) 
 Least Concern
IBRA regions
DISPLAY ALL
4 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Rare
, Vulnerable
2 of 2 subregionsKanmantooLeast Concern
, Rare
6 of 6 subregionsFlinders Lofty BlockLeast Concern
, Near Threatened
, Data Deficient
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Data Deficient
5 of 6 subregionsMurray Darling DepressionLeast Concern
, Near Threatened
, Vulnerable
, Data Deficient
2 of 8 subregionsGawlerLeast Concern
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. Perpusilla meaning very small or very weak; referring to its habit.
Distribution:
Found across the southern part in South Australia, growing on loam or sandy loam in mallee and woodland. Also found in Western Australia, New South wales and Victoria.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Annual herb to 10 cm high with erect to ascending, hairless stems. Leaves all above the base, linear to oblanceolate, entire to lobed to 3 cm long, hairless or with minute glandular hairs. Flowers green and not obvious because the ray florets hardly extend beyond the bracts. Flowering between July and October.
Fruit type:
Small daisy heads.
Seed type:
Flat red ovoid seed to 3 mm long and 1.5 mm wide, with deeply divided into hair-tipped lobes margin and scattered hairs on the 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 one collection, the seed viability was average, at 65%.
Seed germination:
This species has physiological dormancy that needs to be overcome for the seed to germinate.For a dormant seed-lot, dormancy may be alleviated with after-ripening for 6-12 months at 45 degrees celsius or for 12 months at 30 degrees celsius.  One month of moist stratification at 30 degrees celsius, followed by 10 weeks on agar containing 250 mg/L gibberellic acid may also stimulate germination.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA6000 (1.93 g)5018-Sep-2007RJB74730
South Eastern
19-Sep-200865%-18°C
MJT1811-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 201285%7d14d 6 months after-ripening at 45 °C C/30% relative humidity
1% water agar
Incubated under spring/autumn conditions
January 201260%7d7d 12 months after ripening at 30 °C C/30% relative humidity
1% water agar
Incubated under spring/autumn conditions
July 20103%NANA None
1% w/v water agar supplemented with 250 mg/L gibberellic acid
Incubated under winter conditions
July 20100%NANA None
1% w/v water agar
Incubated under winter conditions
July 20100%NANA None
1% w/v water agar
Incubated under spring/autumn conditions
July 20100%NANA None
1% w/v water agar
Incubated under summer conditions
July 20100%NANA None
1% w/v water agar supplemented with 250 mg/L gibberellic acid
Incubated under spring/autumn conditions
July 20100%NANA None
1% w/v water agar supplemented with 250 mg/L gibberellic acid
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)