Seeds of South Australia
Gyrostemon tepperi (Gyrostemonaceae)
Tepper's Wheel-fruit
List of species for Gyrostemon
Seed collecting:
August to November
Herbarium regions:
North Western, Lake Eyre
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Kintore (GVD04) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [could be VU; edge of range]
Sturt Stony Desert (CHC02)Channel Country
 Rare   (IUCN: RA d(i,ii))   [outlier ]
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [could be VU; edge of range]
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. Tepperi named after John William Otto Tepper (1868–1957), son of Johann Gottlieb Otto Tepper, who collected extensively at and near Roebuck Bay (where the type specimen for this species was collected from) before sending them to his father, who forwarded them to Mueller for identification.
Distribution:
Found in the far north-western and north-eastern parts of South Australia, growing on spinifex-dominated sandplains, low sandy rises and dunefields. Also fond in Western Australia, Northern Territory and Queensland.
Status:
Native. Rare in South Australia. Rare in Queensland. Common in the other states. More common post fire.
Plant description:
Multi-stemmed shrub to 2 m high with a green canopy and smooth pinkish or yellowish bark. Leaves alternate, linear, terete, glabrous, to 35 mm long and 1 mm wide. Male and female flowers on separate plants. and the perianth is green and consists of fused alike segments. Males flowers 1 to 2 rarely 3 on short racemes with 7-10 stamens in one whorl. Female flower 1 or 2, with the ovary having 2 carpels but often only one develops in the mature fruit. Flowering between June to September.
Fruit type:
Redd-yellowish ovate to almost semicircular fleshy fruit often with undulate transverse ridges from the centre and a flattened aril wrapped around much of the seed. 
Seed type:
Brown reniform seed with a rugose surface.
Embryo type:
Curved linear fully developed.
Seed collecting:
Collect fruits that are fat, turning reddish or starting to dry and fall off easily.
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 morphophysiological dormancy and complex germination requirements. This species is considered a fire responsive species.