Seeds of South Australia
Cullen patens (Leguminosae)
Spreading Scurf-pea
List of species for Cullen
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Seed collecting:
October to January
Herbarium regions:
Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Murray
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Central Flinders (FLB06)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [limited habitat, edge of range]
Arcoona Plateau (GAW04)Gawler
 Rare   (IUCN: RA d(i,ii))   [southern limit]
Torrens (GAW06) 
 Least Concern   [undercollected]
Roxby (GAW07) 
 Near Threatened
Curnamona (BHC06)Broken Hill Complex
 Rare   (IUCN: RA d(i))
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Near Threatened   [often confused with C pallidum]
Dieri (SSD03) 
 Near Threatened   [often confused with C pallidum]
Warriner (SSD04) 
 Rare   (IUCN: RA d(ii))   [often confused with C pallidum]
Strzelecki Desert (SSD05) 
 Near Threatened   [often confused with C pallidum]
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(ii))   [edge of range]
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Macumba (STP05) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Witjira (STP06) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Coongie (CHC06) 
 Near Threatened   [undercollected]
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(ii))   [edge of range]
Pedirka (FIN04)Finke
 Rare   (IUCN: RA d(ii))   [edge of range]
IBRA regions
DISPLAY ALL
Central Flinders (FLB06)Flinders Lofty BlockRare
  (IUCN: RA d(i,ii))   [limited habitat, edge of range]
3 of 8 subregionsGawlerLeast Concern
, Near Threatened
, Rare
Curnamona (BHC06)Broken Hill ComplexRare
  (IUCN: RA d(i))
4 of 4 subregionsSimpson Strzelecki DunefieldsNear Threatened
, Rare
5 of 7 subregionsStony PlainsLeast Concern
, Rare
2 of 4 subregionsChannel CountryLeast Concern
, Near Threatened
Mann-Musgrave Block (CER01)Central RangesRare
  (IUCN: RA d(ii))   [edge of range]
Pedirka (FIN04)FinkeRare
  (IUCN: RA d(ii))   [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 Cullen]
Name derivation:
Cullen named after William Cullen (1710-1790), a Scottish physician and chemist who lectured at the University of Glasgow on among other things botany. Patens  from the Latin 'patens' meaning to open; alluding to the spreading habit of the species.
Distribution:
Found mainly in the north-east part of South Australia with disjunct population on the Nullabor and along the Murray, growing growing on clay or sandy clay soil. Also found in all mainland states.
Status:
Native. Common in South Australia. Rare in victoria. Uncommon in Western Australia. Common in the other states.
Plant description:
Perennial herb with stems erect or ascending at first, but always prostrate at maturity, gland-dotted. Leaves to 10 cm long, pinnately 3-foliolate; leaflets ovate, to 4 cm long and 20 mm wide, margins toothed, upper surface glabrous or grey-pubescent, lower surface usually more densely hairy. Flower-spike to 9 cm long with pink or blue pea-flowers. Flowering between July and November.
Fruit type:
Blackish pod to 3 mm long, hairy with one seed inside.
Seed type:
Orange-brown bean-shaped seed to 3 mm long and 2 mm wide, smooth surface and covered with long white hairs.
Embryo type:
Bent.
Seed collecting:
Collect maturing pods, those that are fat, turning black and contain a brown seed inside, by running your hands along the fruit-spikes.
Seed cleaning:
Place the pods in a tray and leave to dry for 1 to 2 weeks or until the pods begin to split. Then rub the dried pods to dislodge the seeds. Use a sieve to separate any 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 viability:
From one collection, the seed viability was high, at 90%.
Seed germination:
This species has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat).
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
11000 (66.25 g)
11000 (66.25 g)
100+25-Nov-2005DJD247
Eastern
7-Aug-200690%-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
July 2015100%7d7d seed coat nicked
1% water agar
Incubated under spring/autumn conditions
July 201510%7dNA None
1% water 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)