Seeds of South Australia
Gyrostemon ramulosus (Gyrostemonaceae)
Chinese Bush
List of species for Gyrostemon
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Seed collecting:
August to December
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
Eyre Hills (EYB03)Eyre Yorke Block
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Gawler Volcanics (GAW02) 
 Rare   (IUCN: RA d(i,ii))   [sand dune species]
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(i,ii))   [sand dune species]
Roxby (GAW07) 
 Rare   (IUCN: RA d(i,ii))   [localised]
Maralinga (GVD03)Great Victoria Desert
 Least Concern
Kintore (GVD04) 
 Least Concern
Tallaringa (GVD05) 
 Least Concern
Yellabinna (GVD06) 
 Least Concern
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Rare   (IUCN: RA d(i,ii))   [limited habitat]
Lake Pure (CHC07) 
 Rare   (IUCN: RA d(i,ii))
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(i,ii))
Watarru (CER02) 
 Least Concern
Everard Block (CER03) 
 Rare   (IUCN: RA d(ii))   [edge of range]
IBRA regions
2 of 5 subregionsEyre Yorke BlockLeast Concern
4 of 8 subregionsGawlerRare
4 of 4 subregionsGreat Victoria DesertLeast Concern
Nullarbor Plain (NUL02)NullarborLeast Concern
2 of 4 subregionsChannel CountryRare
3 of 3 subregionsCentral RangesLeast Concern
, Rare
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 Gyrostemon]
Name derivation:
Gyrostemon from the Greek 'gyros' meaning a circle and 'stemon' meaning a stamen, alluding to the whorled stamens. Ramulosus from the Latin 'ramulus' meaning many small branches or twigs, referring to the branching habit of the species.
Found mainly in the western half of South Australia with an isolated distribution in the far north-east corner, growing on sand, in sandy rises and desert dunes. Also found in Western Australia, Northern Territory and Queensland.
Native. Common in South Australia. Rare in Queensland. Common in the other States. More common post fire.
Plant description:
Shrubs or trees to 5 m tall, with corky bark on the old branches. Leaves slender, to 70 mm long and 1 mm wide; pointed, terete, soft. Male flowers with recurved pedicels to 5 mm long and 5 mm across at anthesis, with the calyx distinctly lobed and the lobes acute, with numerous anthers in several whorls. Female flowers with recurved pedicels to 7 mm long, with the calyx distinctly lobed and the lobes being acute or obtuse, with usually 20-30 carpels each with a sessile stigma, spreading to form a crown above the ring of ovaries. Flowering between May and September.
Fruit type:
Pale brown spherical fruit to 6 mm long formed from multiple seed segments.
Seed type:
Grey-brown reniform seeds to 2.4 mm long and 1.8 mm wide, with a rugose surface and a yellowish aril.
Embryo type:
Curved linear fully developed.
Seed collecting:
Collect fruits when the segments are about to fall apart, usually when colour changes to pale brown.
Seed cleaning:
Place the fruits in a tray and leave to dry for a week. Then rub the fruit gently by hand to dislodge the seeds from the papery wing. 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 germination:
This species is generally difficult to germinate, it has morpho-physiological dormancy and complex germination requirements. This species is considered a fire responsive species.