Seeds of South Australia
Brachyscome cuneifolia (Compositae)
Wedge-leaf Daisy
List of species for Brachyscome
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Seed collecting:
October to December
Herbarium regions:
Eyre Peninsula, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Northern and Yorke, South East
IBRA regions
Bridgewater (NCP01)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU D2)   [in Tilley Swamp CP]
Tintinara (NCP04) 
 Vulnerable   (IUCN: VU D2)   [needs more survey work]
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [in Flinders Chase ]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(i,ii))   [limited habitat; in Newland Head]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [quality of habitat declined; prob more records not databased]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(i,ii))   [on loan, lack of records]
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. Cuneifolia from the Latin 'cuneus' meaning wedge and 'folium' meaning a leaf; referring to the wedge-shaped leaf.
Distribution:
Found along the coast from Eyre Peninsula to the South-east in South Australia, growing in mallee on calcareous soils. Also found in Victoria.
Status:
Native. Uncommon in South Australia. Rare in Victoria.
Plant description:
Perennial herb to 60 cm high with unbranched, short, erect stems. Leaves all near the basal, sometimes forming a rosette, sessile, oblanceolate to spathulate, shallowly obtuse-lobed, to 6 cm long and 1.5 cm wide. Inflorescence solitary on a long stalk with large white ray florets and yellow disc florets. Flowering between August and October.
Fruit type:
Brown daisy head.
Seed type:
Flat brown, ovoid seed to 3 mm long and 2.5 mm wide, with a broad wing and scattered hairs on the margin. Central part covered in scattered hairs and a minute pappus at one end.
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 collections, the seed viability was average, at 55%.
Seed germination:
This species may have physiological dormancy that needs to be overcome for the seed to germinate. Germinates well at cool temperatures (between 7 oC and 17.5 oC).
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA800 (0.44 g)18-Oct-2006DJD575
Yorke Peninsula
1-Aug-200755%-18°C
DJD12941-Jan-2012-18°C
TST8221-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
July 201090%7d21d None
1% w/v water agar
Incubated under winter conditions
July 201050%21d42d None
1% w/v water agar
Incubated under spring/autumn conditions
July 201015%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)