Seeds of South Australia
Daviesia devito (Leguminosae)
Spiny Bitter-pea
List of species for Daviesia
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Seed collecting:
November to January
Herbarium regions:
Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Lucindale (NCP03)Naracoorte Coastal Plain
 Endangered   (IUCN: EN D)
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))
Kangaroo Island (KAN01)Kanmantoo
 Endangered   (IUCN: EN D)   [only around Kingscote]
Fleurieu (KAN02) 
 Vulnerable   (IUCN: VU D2)   [around Finniss]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Critically Endangered   (IUCN: CR D)   [only pops north of Nuriootpa]
Broughton (FLB02) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [needs mallee & good brown loams, mostly on roadsides, localised, low popn numbers]
Central Flinders (FLB06) 
 Data Deficient   [dodgy ID's; easy to confuse with D genistifolia]
Southern Yorke (EYB01)Eyre Yorke Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [needs mallee & good brown loams, mostly on roadsides, localised, low popn numbers]
St Vincent (EYB02) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [needs mallee & good brown loams, mostly on roadsides, localised, low popn numbers]
Eyre Hills (EYB03) 
 Rare   (IUCN: RA d(ii))   [limited habitat, needs loam flats]
Talia (EYB04) 
 Rare   (IUCN: RA d(ii))   [limited habitat, needs loam flats]
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))   [limited habitat, needs loam flats]
Murray Mallee (MDD02)Murray Darling Depression
 Vulnerable   (IUCN: VU D2)   [likes brown loams]
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(i,ii))   [edge of range; on roadsides]
Lowan Mallee (MDD04) 
 Vulnerable   (IUCN: VU D2)   [likes brown loams]
Wimmera (MDD05) 
 Rare   (IUCN: RA d(ii))   [stronghold in SE]
Yellabinna (GVD06)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))
Yalata (NUL03)Nullarbor
 Rare   (IUCN: RA d(i,ii))
IBRA regions
DISPLAY ALL
2 of 4 subregionsNaracoorte Coastal PlainRare
, Endangered
2 of 2 subregionsKanmantooVulnerable
, Endangered
3 of 6 subregionsFlinders Lofty BlockEndangered
, Critically Endangered
, Data Deficient
5 of 5 subregionsEyre Yorke BlockRare
, Endangered
4 of 6 subregionsMurray Darling DepressionRare
, Vulnerable
Yellabinna (GVD06)Great Victoria DesertRare
  (IUCN: RA d(i,ii))
Yalata (NUL03)NullarborRare
  (IUCN: RA d(i,ii))
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 Daviesia]
Name derivation:
Daviesia named after Rev. Hugh Davies (1739-1821), a Welsh botanist and an Anglican clergyman. Benthamii named after George Bentham (1800-1884), an English botanist and author, characterised by Duane Isely as "the premier systematic botanist of the nineteenth century". Humilis from the Latin 'humus' meaning low; referring to the low-growing habit of the plants.
Distribution:
Found in the southern part of South Australia, from the southern Eyre Peninsula to the South-east, growing in mallee on sandy or loamy, usually calcareous soils. Also found in New South Wales and Victoria.
Status:
Native. Uncommon in South Australia. Rare in New South Wales. Uncommon in Victoria.
Plant description:
Dense often depressed shrubs to 60 cm high. Phyllodes terete, to 30 mm long and 1.75 mm wide, rigid, pungent, continuous with branchlet at base. Flower-spike of 4-6 orange to red pea-flowers. Flowering between September and November.
Fruit type:
Pale brown half-circle pod to 7 mm long and 5.5 mm wide, with one seed inside.
Seed type:
Pale brown with black mottled reniform seed to 4 mm long and 2 mm wide, and a cream aril.
Embryo type:
Bent.
Seed collecting:
Collect maturing brown seed pods from the plant using secateurs or by hand. Plant is prickly so it is advisable to wear gloves.
Seed cleaning:
Leave the pods in a paper bag to dry for at least a week. Rub the pods gently wiht a rubber bung to dislodge the seeds. Use a sieve to separate the seeds from unwanted material. Store the dried fruit heads 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 has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat). 1. Germination 85%, seed scarified (chipped with scalpel) on 1% w/v agar, 8/16 dark/light, 20°C. 2. Germination 85%, seed scarified (chipped with scalpel) on 1% w/v agar, 8/16 dark/light, 25°C. See http//data.kew.org/sid
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
March 2014100%7d14d Seed coat nicked
70mm glass petri dishes on 1% w/v agar
Incubated under spring/autumn conditions
March 2014100%7d14d Seed coat nicked
70mm glass petri dishes on 1% w/v agar
12/12 dark/light  /  20C Constant
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)