Seeds of South Australia
Eutaxia diffusa (Leguminosae)
Spreading Eutaxia
List of species for Eutaxia
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Seed collecting:
November to January
Herbarium regions:
Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   [on roadsides; limited habitat]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))
Broughton (FLB02) 
 Vulnerable   (IUCN: VU C2a(i))   (Probable Decline)
Olary Spur (FLB03) 
 Vulnerable   (IUCN: VU C2a(i))   (Probable Decline)
Southern Flinders (FLB04) 
 Vulnerable   (IUCN: VU C2a(i))   (Probable Decline)
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(i,ii))   [northern edge of range; limited habitat]
Southern Yorke (EYB01)Eyre Yorke Block
 Vulnerable   (IUCN: VU C2a(i))   (Probable Decline)   [not picked up in recent surveys could be EN]
St Vincent (EYB02) 
 Vulnerable   (IUCN: VU C2a(i))   (Probable Decline)   [not a lot of suitable habitat]
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))
Talia (EYB04) 
 Data Deficient
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(i,ii))
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(ii))   [lots on roadsides]
Lowan Mallee (MDD04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU D2)
IBRA regions
Tintinara (NCP04)Naracoorte Coastal PlainVulnerable
  (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
2 of 2 subregionsKanmantooRare
5 of 6 subregionsFlinders Lofty BlockRare
, Vulnerable
5 of 5 subregionsEyre Yorke BlockRare
, Vulnerable
, Data Deficient
3 of 6 subregionsMurray Darling DepressionRare
, Vulnerable
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 Eutaxia]
Name derivation:
Eutaxia from the Greek 'eu' meaning well and 'taxis' meaning arrangement in row; referring to the regular arrangement of leaves. Diffusa from Latin meaning to spread out or wide; alluding to either its spreading habit or relatively uncrowded leaves.
Found on the southern Eyre peninsula, Flinders Ranges, Yorke Peninsula, Mount Lofty Ranges, Kangaroo Island and the upper South-east in South Australia, growing in mallee communities. Also found in Queensland, New South Wales and Victoria.
Native. Common in South Australia. Common in all states.
Plant description:
Variable shrub, often low, dense and intricate or erect with stems usually glabrous, with smaller ones often spinescent. Leaves opposite, obovate to ovate or rhombic, to 7 mm long and 3 mm wide, apex subacute, concave, keeled, usually glabrous. Flowers to 6 mm long, solitary, or rarely paired, yellow, lacking obvious red veins with purple keel. Flowering between August and November.
Fruit type:
Brown pod to 5 mm long, very swollen with a long stripe.
Seed type:
Brown mottled reniform seed to 2.5 mm long and 2 mm wide, dull, with a long aril.
Embryo type:
Seed collecting:
Collect maturing pods, those brown or turning brown and contain hard black seeds inside.
Seed cleaning:
Place the pods in a paper bag and leave to dry for one to two weeks. Then rub the pods with a rubber bung 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:
From one collection, the seed viability was high, at 95%.
Seed germination:
This species has physical dormancy that needs to be overcome for the seed to germinate. The seed coat needs to be ruptured so that water can enter the seed before germination can occur. Methods to rupture the seed coat include scarification with sand paper or nicking the seed coat with a sharp blade or hot water treatment by immersion in boiling water.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
2877 (10.07 g)
3075 (10.8 g)
~602-Dec-2004DJD 59
South Eastern
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.