Seeds of South Australia
Olearia magniflora (Compositae)
Splendid Daisy-bush
List of species for Olearia
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Seed collecting:
December to January
Herbarium regions:
Nullarbor, Flinders Ranges, Eyre Peninsula, Murray, Yorke Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Murray-Darling Basin
IBRA regions
Fleurieu (KAN02)Kanmantoo
 Data Deficient   [grows on hard limestone; 1 old record, query location]
Southern Flinders (FLB04)Flinders Lofty Block
 Data Deficient
Talia (EYB04)Eyre Yorke Block
 Rare   (IUCN: RA d(i,ii))
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Near Threatened   (Probable Decline)   [goats a threat]
Murray Mallee (MDD02) 
 Near Threatened   (Probable Decline)   [not good recruitment]
Braemer (MDD07) 
 Data Deficient
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [limited habitat; top of cliffs]
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(i,ii))
Yellabinna (GVD06)Great Victoria Desert
 Least Concern
Yalata (NUL03)Nullarbor
 Least 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 Olearia]
Name derivation:
Olearia named after Johann Gottfried Ölschläger (1603-1671), 17th century German horticulturist and author of a flora of Halle in Germany (his name was latinized to Olearius). Alternatively, it maybe from the Latin 'olearius' pertaining to oil, from 'olea', for olive tree; alluding to the first named species resembling the olive. Magniflora from Latin meaning large flowers.
Distribution:
Found in mallee and arid woodland communities, in the Nullabor, Eyre Peninsula and Murray regions of South Australia. Also found in Western Australia, New South Wales and Victoria.
Status:
Native. Common in South Australia. Common in other states.
Plant description:
Shrub to 1m high with erect stems, sparsely branched, more or less woody, glabrous, without ribs. Leaves sessile, cuneate to oblanceolate, narrowed at the base, to 18mm long and 5mm wide, glabrous, slightly viscid, dark-green with a prominent midrib and margins with 3-5-toothed at the apex. Flower head solitary, terminal on a stalk less than 1 cm long with a large mauve to purple flower with a yellow centre. Flowering between August and November.
Fruit type:
Large fluffy daisy heads containing numerous seeds.
Seed type:
Striate brown, semi-flat achenes to 9mm long and 2mm wide with dense unequal pappus bristles to 15mm long.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect heads that are large and fluffy. Either pick off the whole heads or use your finger and pull off the seeds from the head. Mature seeds will come off easily.
Seed cleaning:
Place the heads in a tray for a week to dry. No cleaning is required if only pure seeds are collected. If heads are collected, then rub the heads gently with your hands to dislodge the seeds. Viable seeds will be fat and hard. 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 germination:
Seeds are non-dormant, viable seed should germinate readily.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Oct-1590%7 d7 d 500 mg/L gibberellic acid 48 h;
1% agar;
Incubated under winter conditions
Oct-1584%7 d14 d
1% agar;
Incubated under winter conditions
Oct-1576%7 d14 d 500 mg/L gibberellic acid 48 h;
1% agar;
Incubated under spring/autumn conditions
Oct-1574%7 d21 d
1% 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)