Seeds of South Australia
Trachymene ornata (Umbelliferae)
Sponge-fruit Trachymene
List of species for Trachymene
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Herbarium regions:
Gairdner-Torrens, Flinders Ranges, Eastern
NRM regions:
Eyre Peninsula, Northern and Yorke, South Australian Arid Lands
IBRA regions
Southern Flinders (FLB04)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))   [edge of range]
Central Flinders (FLB06) 
 Vulnerable   (IUCN: VU D2)
Eyre Hills (EYB03)Eyre Yorke Block
 Least Concern   [should be more records]
Eyre Mallee (EYB05) 
 Least Concern   [should be more records]
Myall Plains (GAW01)Gawler
 Least Concern   [should be more records]
Gawler Volcanics (GAW02) 
 Least Concern   [should be more records]
Yellabinna (GVD06)Great Victoria Desert
 Least Concern   [should be more records]
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 Trachymene]
Name derivation:
Greek 'trachys' rough, 'mene' moon and Latin 'ornatus' adorned
Found in rocky areas often on shallow soils. 
Plant description:
Annual herb, 4-20 cm high, stems sparsely hairy. Leaves deeply 3-lobed to dissected, scattered hairs, lamina ovate in outline, 1–3 cm long, 0.5–3 cm wide. Inflorescence an 3-6 flowered umbel, 10mm in diameter, petals white. Flowering July-October.
Fruit type:
Fruit broad ovate,  4-5 mm long, 6-8 mm broad, both mericarps developed and covered with dense woolly white hairs.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA12000 (20.51 g)50+3-Nov-2005DJD180
Eyre Peninsula
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:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Mar-1424%7 dNA 504 mg/L gibberellic acid 48 h;
1% agar;
Incubated under winter conditions
Mar-1324%14 dNA 502 mg/L gibberellic acid 48 h;
1% agar;
Incubated under spring/autumn conditions
Mar-1424%14 dNA
1% agar;
Incubated under winter conditions
Mar-1416%14 dNA
1% agar;
Incubated under spring/autumn conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)