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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
Display IBRA region text
Broughton (FLB02) | Flinders Lofty Block | Rare (IUCN: RA ab) (Probable Decline) [On edge of range. Threatened by rabbits.] |
Olary Spur (FLB03) | | Rare (IUCN: RA ab) (Probable Decline) |
Southern Flinders (FLB04) | | Rare (IUCN: RA ab) (Probable Decline) [On edge of range. Threatened by rabbits.] |
St Vincent (EYB02) | Eyre Yorke Block | Rare (IUCN: RA ab) (Probable Decline) [often with chenopods] |
Eyre Hills (EYB03) | | Least Concern |
Eyre Mallee (EYB05) | | Least Concern |
South Olary Plain (MDD01) | Murray Darling Depression | Least Concern (Probable Decline) [slow ongoing decline; longlived spp; no recruitment seen] |
Murray Mallee (MDD02) | | Least Concern (Probable Decline) [slow ongoing decline; longlived spp; no recruitment seen] |
Braemer (MDD07) | | Rare (IUCN: RA ab) (Probable Decline) |
Myall Plains (GAW01) | Gawler | Least Concern |
Gawler Volcanics (GAW02) | | Least Concern |
Gawler Lakes (GAW03) | | Rare (IUCN: RA d(ii)) |
Arcoona Plateau (GAW04) | | Rare (IUCN: RA d(ii)) |
Kingoonya (GAW05) | | Rare (IUCN: RA d(ii)) |
Roxby (GAW07) | | Rare (IUCN: RA d(i,ii)) |
Commonwealth Hill (GAW08) | | Near Threatened |
Maralinga (GVD03) | Great Victoria Desert | Rare (IUCN: RA d(ii)) |
Yellabinna (GVD06) | | Least Concern |
Nullarbor Plain (NUL02) | Nullarbor | Least Concern |
Yalata (NUL03) | | Least Concern |
Hampton (HAM01) | Hampton | Least Concern |
3 of 6 subregions | Flinders Lofty Block | Rare |
3 of 5 subregions | Eyre Yorke Block | Least Concern , Rare |
3 of 6 subregions | Murray Darling Depression | Least Concern , Rare |
7 of 8 subregions | Gawler | Least Concern , Near Threatened , Rare |
2 of 4 subregions | Great Victoria Desert | Least Concern , Rare |
2 of 3 subregions | Nullarbor | Least Concern |
Hampton (HAM01) | Hampton | Least Concern |
Botanical art
Kath Alcock paintings: 2
Prior names
Stera conocephala
Aster conocephalus
Eurybia conocephala
Pluchea conocephala
Olearia conocephala
Common names
Blue-bush Daisy
Greybush
Etymology
Cratystylis from the Greek 'cratys' meaning strong and 'stylos' meaning column, style, referring to the robust and rigid style. Conocephala from the Greek 'cono' meaning cone and 'cephale' meaning head, alluding to the cone-shaped flower-head.
Distribution and status
Found along a central band from the Nullabor to the New South Wales border growing in mallee, myall, coastal scrub and woodland on calcareous loam and sandy soils. Also found in Western Australia, New South Wales and Victoria. Native. Common in South Australia. Very rare in New South Wales and Victoria. Common in Western Australia.
Herbarium regions: North Western, Nullarbor, Gairdner-Torrens, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula
AVH map: SA distribution map (external link)
Plant description
Silver or blue-grey perennial shrub to 1.8 m high with erect, densely branched stems, forming a trunk with fibrous bark. Leaves obovate to cuneate to 10 mm long and 4 mm wide, with both surfaces white to grey-tomentose; midvein distinct. Flower-head terminal, solitary; sessile on leafy branchlets, with white daisy-flowers. Flowering between September and December. Fruits are pale yellow, long daisy-head. Seeds are plae bown, narrowly cylindric seed to 7 mm long, with 50-100 pappus bristles. Seed embryo type is spatulate.
Seed collection and propagation
Collect seeds between December and February. Collect seeds by picking the heads when they are turning brown and easily come away from the plant. Leave the heads in a paper bag to dry for at least a week. No further cleaning required if only heads are collected. Store the dried heads with a desicant such as dried silica beads or dry rice, in an air tight container in a cool and dry place. Seeds are non-dormant, viable seed should germinate readily. Germination 95% on 1% w/v agar, 8/16 dark/light, 15°C. See http://data.kew.org/sid
Location | No. of seeds (weight grams) | Number of plants | Date collected | Collection number Collection location | Date stored | % Viability | Storage temperature | BGA MSB | 12,100 (24.27 g) 12,100 (24.27 g) | 68 | 21-Jan-2004 | MKJ21 Eyre Peninsula | 23-Mar-2006 | | -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:
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