Seeds of South Australia
Olearia suffruticosa (Compositae)
Clustered Daisy-bush
List of species for Olearia
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Seed collecting:
April to June
Herbarium region:
South Eastern
NRM region:
South East
IBRA region
Bridgewater (NCP01)Naracoorte Coastal Plain
 Critically Endangered   (IUCN: CR D)   [Andy Ellis' place 1 pop]
Glenelg Plain (NCP02) 
 Regionally Extinct   [possibly extinct, extensively searched for & planted over by pines]
Lucindale (NCP03) 
 Endangered   (IUCN: EN D)
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), a German horticulturist and author of 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. Suffruitcosa from the Latin 'suffruticosus' meaning subshrubby or somewhat woody, referring to the habit of the species.
Distribution:
Found in two locations in the South-east in South Australia, growing on swampy ground of low nutrient. Also found in Victoria.
Status:
Native. Very rare in South Australia. Very rare in Victoria.
Plant description:
Erect, short-lived subshrub to 70 cm high with sticky slender shoots arising from a woody stock. Stems erect, striate, glabrous, green, with divaricate branches above forming a lax corymbose panicle. Leaves sessile, more or less erect to subappressed, linear, entire, obtuse or the uppermost ones apiculate, to 24 mm long and 0.8 mm wide, decreasing in size up the stem, subterete, channeled above, convex on the lower side, glabrous. Inflorescence panicle like with white to pink daisy flowers. Flowering between February and May. 
Fruit type:
Fluffy white heads.
Seed type:
Pale brown obovoid seed to 2 mm long and 0.8 mm wide, covered in dense hairs and short barbed pappus.
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 viability:
From nine collections, the seed viability were average to high, ranging from 60% to 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
7270 (2 g)
3600 (1 g)
40-5012-Apr-2006DJD464
South Eastern
14-Sep-200685%+5°C, -18°C
BGA5800 (4.02 g)40-503-Apr-2007DJD779
South Eastern
1-Aug-200770%+5°C, -18°C
BGA7900 (1.1 g)23-Apr-2009DJD1496
South Eastern
20-Jul-2009100%-18°C
BGA3200 (0.68 g)30+28-May-2009TST737
South Eastern
20-Jul-2009100%-18°C
BGA3300 (0.6 g)25+23-Apr-2009DJD1400
South Eastern
20-Jul-2009100%-18°C
BGA1200 (0.4 g)1029-Apr-2010DJD1400
South Eastern
Jun-201060%-18°C
BGA580 (0.15 g)22-Jan-2011TST737
South Eastern
1-Jan-2012100%-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.