Cyanothamnus coerulescens ssp. coerulescens
Rutaceae
Blue Boronia
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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
Mount Gambier (SVP02) | Southern Volcanic Plain | Vulnerable (IUCN: VU D2) [old record, imprecise loc.] |
Bridgewater (NCP01) | Naracoorte Coastal Plain | Rare (IUCN: RA d(ii)) (Probable Decline) [edge of range] |
Lucindale (NCP03) | | Least Concern |
Tintinara (NCP04) | | Least Concern |
Kangaroo Island (KAN01) | Kanmantoo | Rare (IUCN: RA d(ii)) [localised] |
Fleurieu (KAN02) | | Least Concern [undercollected] |
Mount Lofty Ranges (FLB01) | Flinders Lofty Block | Rare (IUCN: RA d(ii)) (Probable Decline) [loss of habitat, small pops; needs sand] |
Southern Yorke (EYB01) | Eyre Yorke Block | Vulnerable (IUCN: VU B2ab(ii,iii)) (Probable Decline) [white sand species] |
St Vincent (EYB02) | | Endangered (IUCN: EN B2ab(ii,iii)) (Probable Decline) [white sand species] |
Eyre Hills (EYB03) | | Least Concern |
Talia (EYB04) | | Least Concern |
Eyre Mallee (EYB05) | | Least Concern |
South Olary Plain (MDD01) | Murray Darling Depression | Rare (IUCN: RA d(ii)) |
Murray Mallee (MDD02) | | Least Concern |
Murray Lakes and Coorong (MDD03) | | Rare (IUCN: RA d(ii)) [localised, lack of habitat] |
Lowan Mallee (MDD04) | | Least Concern |
Murray Scroll Belt (RIV06) | Riverina | Rare (IUCN: RA a) (Probable Decline) |
Myall Plains (GAW01) | Gawler | Rare (IUCN: RA d(ii)) |
Gawler Volcanics (GAW02) | | Least Concern |
Maralinga (GVD03) | Great Victoria Desert | Rare (IUCN: RA d(ii)) |
Yellabinna (GVD06) | | Least Concern |
Yalata (NUL03) | Nullarbor | Rare (IUCN: RA d(ii)) |
Mount Gambier (SVP02) | Southern Volcanic Plain | Vulnerable (IUCN: VU D2) [old record, imprecise loc.] |
3 of 4 subregions | Naracoorte Coastal Plain | Least Concern , Rare |
2 of 2 subregions | Kanmantoo | Least Concern , Rare |
Mount Lofty Ranges (FLB01) | Flinders Lofty Block | Rare (IUCN: RA d(ii)) (Probable Decline) [loss of habitat, small pops; needs sand] |
5 of 5 subregions | Eyre Yorke Block | Least Concern , Vulnerable , Endangered |
4 of 6 subregions | Murray Darling Depression | Least Concern , Rare |
Murray Scroll Belt (RIV06) | Riverina | Rare (IUCN: RA a) (Probable Decline) |
2 of 8 subregions | Gawler | Least Concern , Rare |
2 of 4 subregions | Great Victoria Desert | Least Concern , Rare |
Yalata (NUL03) | Nullarbor | Rare (IUCN: RA d(ii)) |
Botanical art
Kath Alcock paintings: 6
Prior names
Boronia coerulescens ssp. coerulescens
Common names
Blue Boronia
Etymology
Cyanothamnus is from the Greek words cyano meaning blue, and thamnus meaning shrub. Coerulescens meaning bluish or becoming blue, alluding to the colour of the flowers.
Distribution and status
Found in the southern part of South Australia from the Nullarbor to the lower South-east growing in mallee communities on sand. Also found in Western Australia, New South Wales and Victoria. Native. Common in South Australia. Common in the other States.
Herbarium regions: Nullarbor, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern, Green Adelaide
AVH map: SA distribution map (external link)
Plant description
Small shrub to 50 cm high. Leaves linear-oblong to 8 mm long and 1.5 mm wide; glabrous or sparsely setose, usually glandular-warty. Inflorescences axillary, mostly solitary, rarely 2 per cyme with blue, purplish or white flowers. Flowering between August and October. Fruits are pale brown, two to four segmented capsule. Seeds are black ovoid seed to 3 mm long and 1.5 mm wide with a wrinkled surface. Seed embryo type is linear fully developed.
Seed collection and propagation
Collect seeds between October and November. Collect mature capsules, those that are turning a pale straw colour and contain hard seeds. Place the capsules in a tray and leave to dry for a weeks. Then rub the capsules gently 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 can be low. This species has physiological dormancy and can be difficult to germinate.
Location | No. of seeds (weight grams) | Number of plants | Date collected | Collection number Collection location | Date stored | % Viability | Storage temperature | MSB | 1,000 (2.95 g) | | 14-Dec-2005 | DJD261 Southern Lofty | | | |
BGA MSB | 1,400 (3.57 g) 1,400 (3.57 g) | | 3-Nov-2005 | DJD261 Southern Lofty | 8-Aug-2006 | 30% | -18°C |
BGA | 2,000 (5.69 g) | | 10-Nov-2014 | JRG198 Southern Lofty | 1-Jan-2016 | 85% | -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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