Seeds of South Australia
Pimelea stricta (Thymelaeaceae)
Gaunt Riceflower
List of species for Pimelea
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Herbarium regions:
Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, 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
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))
Glenelg Plain (NCP02) 
 Vulnerable   (IUCN: VU D2)
Lucindale (NCP03) 
 Near Threatened
Tintinara (NCP04) 
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Near Threatened   (Probable Decline)   [likes limestone; habitat loss]
Fleurieu (KAN02) 
 Least Concern
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Broughton (FLB02) 
 Near Threatened   (Probable Decline)
Olary Spur (FLB03) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
Southern Flinders (FLB04) 
 Least Concern
Northern Flinders (FLB05) 
 Rare   (IUCN: RA d(ii))
Central Flinders (FLB06) 
 Near Threatened
St Vincent (EYB02)Eyre Yorke Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern
Murray Lakes and Coorong (MDD03) 
 Near Threatened
Lowan Mallee (MDD04) 
 Least Concern
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU D2)
Gawler Volcanics (GAW02)Gawler
 Near Threatened
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(i,ii))
Bimbowrie (BHC05)Broken Hill Complex
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)
IBRA regions
DISPLAY ALL
4 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Near Threatened
, Rare
, Vulnerable
2 of 2 subregionsKanmantooLeast Concern
, Near Threatened
6 of 6 subregionsFlinders Lofty BlockLeast Concern
, Near Threatened
, Rare
4 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
, Vulnerable
4 of 6 subregionsMurray Darling DepressionLeast Concern
, Near Threatened
, Vulnerable
2 of 8 subregionsGawlerNear Threatened
, Rare
Bimbowrie (BHC05)Broken Hill ComplexRare
  (IUCN: RA d(i,ii))   (Probable Decline)
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 Pimelea]
Name derivation:
Greek 'pimele' fat, alluding to the fleshy cotyledons and Latin 'strictus' rigid.
Distribution:
Mostly light sandy soils in open woodland, mallee or sandhills.
Status:
Native
Plant description:
Erect shrub to 1.5m, stems glabrous. Leaves narrow-elliptic, 5.5-37 mm long, 1-5 mm wide, acute. Inflorescence a bracteate head, flowers 9-37 per head 10-15mm long, creamy white. Flowering July-October.
Fruit type:
Fruit approximately 5 mm long, green, enclosed in hypanthium base.
Seed type:
Seed narrow-ovoid, hooked at the apex, glabrous, black, reticulate.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
4380 (15.34 g)
4380 (15.34 g)
50+2-Nov-2006DJD646
Northern Lofty
1-Aug-2007100%-18°C
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
May-0723%63 dNA 20% hydrogen peroxide 10 min, water rinse;
filter paper over moist sand;
6 weeks summer, 6 weeks spring/autumn, 6 weeks winter, 6 weeks spring/autumn, 6 weeks summer, 6 weeks spring/autumn;
May-0711%82 dNA 20% hydrogen peroxide 10 min, water rinse;
filter paper over moist sand;
6 weeks winter, 6 weeks spring/autumn, 6 weeks summer, 6 weeks spring/autumn, 6 weeks winter, 6 weeks spring/autumn;
May-0711%48 dNA 20% hydrogen peroxide 10 min, water rinse;
filter paper over moist sand;
Incubated under spring/autumn conditions
May-071%48 dNA 20% hydrogen peroxide 10 min, water rinse;
filter paper over moist sand;
Incubated under winter 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)