Seeds of South Australia
Omphalolappula concava (Boraginaceae)
Burr Stickseed
List of species for Omphalolappula
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Seed collecting:
September to December
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Fleurieu (KAN02)Kanmantoo
 Rare   (IUCN: RA d(ii))   [marginal]
Broughton (FLB02)Flinders Lofty Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Definite Decline)   [not in surveys]
Olary Spur (FLB03) 
 Least Concern   [drier areas]
Southern Flinders (FLB04) 
 Least Concern   [drier areas]
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
St Vincent (EYB02)Eyre Yorke Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Definite Decline)   [not in surveys]
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(i,ii))
Talia (EYB04) 
 Rare   (IUCN: RA d(i,ii))
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Near Threatened   (Probable Decline)
Braemer (MDD07) 
 Least Concern
Murray Scroll Belt (RIV06)Riverina
 Rare   (IUCN: RA ab)   (Probable Decline)
Myall Plains (GAW01)Gawler
 Least Concern
Gawler Volcanics (GAW02) 
 Least Concern
Gawler Lakes (GAW03) 
 Least Concern
Arcoona Plateau (GAW04) 
 Least Concern
Kingoonya (GAW05) 
 Least Concern
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Least Concern
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Kintore (GVD04) 
 Least Concern
Yellabinna (GVD06) 
 Least Concern
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Yalata (NUL03) 
 Least Concern
Hampton (HAM01)Hampton
 Least Concern
Barrier Range (BHC01)Broken Hill Complex
 Least Concern   [drier areas]
Barrier Range Outwash (BHC04) 
 Least Concern
Bimbowrie (BHC05) 
 Least Concern
Curnamona (BHC06) 
 Least Concern
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern
Dieri (SSD03) 
 Least Concern
Warriner (SSD04) 
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Least Concern
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Least Concern
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Coongie (CHC06) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Everard Block (CER03) 
 Least Concern
Tieyon (FIN03)Finke
 Least Concern
IBRA regions
DISPLAY ALL
Fleurieu (KAN02)KanmantooRare
  (IUCN: RA d(ii))   [marginal]
5 of 6 subregionsFlinders Lofty BlockLeast Concern
, Endangered
4 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
, Endangered
3 of 6 subregionsMurray Darling DepressionLeast Concern
, Near Threatened
Murray Scroll Belt (RIV06)RiverinaRare
  (IUCN: RA ab)   (Probable Decline)
8 of 8 subregionsGawlerLeast Concern
3 of 4 subregionsGreat Victoria DesertLeast Concern
, Rare
2 of 3 subregionsNullarborLeast Concern
Hampton (HAM01)HamptonLeast Concern
4 of 4 subregionsBroken Hill ComplexLeast Concern
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
6 of 7 subregionsStony PlainsLeast Concern
2 of 4 subregionsChannel CountryLeast Concern
2 of 3 subregionsCentral RangesLeast Concern
Tieyon (FIN03)FinkeLeast Concern
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 Omphalolappula]
Name derivation:
Omphalolappula refer to the mericarps of this genus which were thought to be intermediate between those of genera Omphalodes and Lappula. Concava from Latin meaning concave; alluding to the mericarps.
Distribution:
Found across much of South Australia, except Kangaroo Island and the South-east, growing in a range of habitats such as mallee scrubs, lake margins and saline flats. Also found in all mainland states.
Status:
Native. Common in South Australia. Uncommon in Queensland. Common in the other states.
Plant description:
Erect or spreading annual to 35 cm high, covered densely with hairs. Leaves sessile or subsessile, narrow-obovate to oblong, to 4 cm long and 6 mm wide, apex acute or obtuse, base cuneate, margins flat. Inflorescences with few blue flowers.Bracts about as long as pedicels, pedicels to 10 mm long. Sepals narrow-elliptic to lanceolate, to 3 mm long. Corolla to 3.5 mm long, glabrous, blue, tube much longer than the oblong lobes, throat scales saccate. Anthers to 0.5 mm long, tapering to a point. Style to 0.5 mm long. Flowering between July and October.
Fruit type:
Brown fruit cluster with a n umber of seeds hanging along fruiting spike.
Seed type:
Brown irregular-shaped seed to 8 mm long and 10 mm wide, surface concave and with few short large spines.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect maturing fruits, those turning brown and contain a hard seed inside, by running your hands along the fruiting spike or break off the whole spike. Wear gloves as fruits can be prickly.
Seed cleaning:
Place the seeds/spikes in a tray and leave to dry for two weeks. No further cleaning is required if only seed collected. If seed spikes collected, use hand to strip off the mature seeds. 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 viability:
From two collections, the seed viability were high, ranging from 90% to 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA300 (0.6 g)327-Sep-2007DJD873
Lake Eyre
19-Sep-200890%
BGA7700 (22.15 g)100+23-Nov-2010KHB478
Flinders Ranges
1-Jan-2012100%-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-1188%7 d14 d
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under winter conditions
May-1122%7 dNA
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under spring/autumn conditions
May-116%14 dNA
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions
May-112%14 dNA
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
May-112%14 dNA
1% agar;
Incubated under winter conditions
May-110%NANA
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)