Seeds of South Australia
Ozothamnus decurrens (Compositae)
Ridged Bush-everlasting
List of species for Ozothamnus
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Seed collecting:
February to March
Herbarium regions:
Eyre Peninsula, Murray, South Eastern
NRM regions:
Eyre Peninsula, South Australian Murray-Darling Basin, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Data Deficient   [locations imprecise]
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [edge of range; dry mallee sp; loss of habitat, lack of fire]
Eyre Hills (EYB03)Eyre Yorke Block
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern
Lowan Mallee (MDD04) 
 Least Concern
Myall Plains (GAW01)Gawler
 Least Concern
Yellabinna (GVD06)Great Victoria Desert
 Least Concern
Yalata (NUL03)Nullarbor
 Rare   (IUCN: RA d(i,ii))
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 Ozothamnus]
Name derivation:
Ozothamnus from the Greek 'ozo' meaning to smell and 'thamnos' meaning shrub; alluding to the fragrant foliage when crushed. Decurrens meaning having the base of the stalk extending down the stem as two raised lines or wings.
Found on Eyre Peninsula and the mid Murray region in South Australia, growing in mallee communities on loamier soils of flats and dune swales, also on rocky outcrops. Also found in Victoria.
Native. Common in South Australia. Uncommon in Victoria.
Plant description:
Spreading shrub to 0.5 m high with branchlets covered in dense cottony hairs. Leaves spreading, sessile, linear, to 8 mm long and 1 mm wide, glabrous and scabrous above, densely cottony and glandular beneath, apex rounded, base decurrent into 2 prominent green, glabrous ridges, margins revolute. Inflorescences hemispherical to 2.5 cm diameter wityh creamy yellow flowers. Flowering between December and January.
Fruit type:
Small creamy brown heads.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect mature seed heads, those turning a creamy-brown.
Seed cleaning:
Place the heads in a tray and leave to dry for 1-2 weeks. Then rub the heads gently with your hands 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.