Plants of
South Australia
Olearia picridifolia
Compositae
Rasp Daisy-bush
Display all 10 images
Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
Enlarge Map
Copy Map
Copy Map
Display IBRA region text

Botanical art

Kath Alcock paintings: 2.

Etymology

Latin 'olearius' pertaining to oil, from 'olea' olive and

Distribution and status

Found mainly in mallee and heath on alkaline soils derived from limestone or dunes. Rare
Herbarium regions: Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South East
AVH map: SA distribution map (external link)

Plant description

Shrub or undershrub up to 1 m high. Leaves sessile, narrowly oblanceolate, acute, attenuate at the base, 2-5 cm long, 2-8 mm wide, grey-green, densely hirsute, with a prominent mid-vein. Capitula solitary or in corymbs of 2-8, on hirsute peduncles 2-10 cm long. Ray florets 15-30; ligules linear, 10-15 mm long, white to blue or violet; disk florets 30-50, yellow. Flowering June - October. Fruits are achenes terete, 2-3 mm long, striate, glabrous; pappus bristles 25-40, in 2 unequal series, the longer ones 4-5 mm long.

Seed collection and propagation

Cut off mature fruiting heads and place in a warm place to dry. Separate seed from fruit head, remove any unwanted material.

Seeds stored:
  Hide
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
 
MSB

1,800 (0.57 g)
330-Dec-2005KHB35
Flinders Ranges
 
MSB

2,750 (1.18 g)
1513-Sep-2006TST28
Yorke Peninsula
BGA3,100 (1.38 g)15+22-Nov-2009KHB315
Flinders Ranges
1-Jun-2010100%+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:
  Display