Seeds of South Australia
Atriplex paludosa ssp. cordata (Chenopodiaceae)
Heart-shaped Fruit Saltbush
List of species for Atriplex
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Seed collecting:
January to December
Herbarium regions:
Nullarbor, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Near Threatened   [edge of range]
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Least Concern   [lots found on cliffs]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern
St Vincent (EYB02) 
 Least Concern
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Murray Lakes and Coorong (MDD03) 
 Least Concern
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(i,ii))
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(i,ii))
Yellabinna (GVD06)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Yalata (NUL03) 
 Least Concern
Hampton (HAM01)Hampton
 Least Concern
IBRA regions
DISPLAY ALL
Bridgewater (NCP01)Naracoorte Coastal PlainNear Threatened
  [edge of range]
2 of 2 subregionsKanmantooLeast Concern
Mount Lofty Ranges (FLB01)Flinders Lofty BlockLeast Concern
5 of 5 subregionsEyre Yorke BlockLeast Concern
2 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
3 of 8 subregionsGawlerRare
Yellabinna (GVD06)Great Victoria DesertRare
  (IUCN: RA d(ii))
2 of 3 subregionsNullarborLeast Concern
Hampton (HAM01)HamptonLeast 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 Atriplex]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
Atriplex from the Latin 'atriplexum' meaning an orache, a saltbush; an Ancient Latin name for this plant. Paludosa from the Latin 'paludosus' meaning marshy, referring to the type species growing on fringes of coastal and near-coastal saltmarshes. Cordata from the Latin 'cordatus' meaning heart-shaped, referring to the shape of the fruit in this subspecies.
Distribution:
Found along the coast in South Australia, from the Nullarbor to the upper South-east, growing on limestone cliffs and coastal stable dunes. Also found in Western Australia.
Status:
Native. Common in South Australia. Uncommon in Western Australia.
Plant description:
Erect shrub to 1 m high. Leaves very narrow-elliptic, acute, entire; scaly all over with leaf blade to 25 mm long and 4 mm wide. Male flowers in clusters along a spike; female flowers in dense panicles. This subspecies differs from the other subspecies found in South Australia by being an erect shrub with leaves that are scaly all over, compared to Atriplex paluoda ssp. paludosa which is a decumbent shrub with leaves that are glabrous above. Flowering throughout the year.
Fruit type:
Heart-shaped fruit to 10 mm long and 12 mm wide; acute, truncate to cordate at the base.
Embryo type:
Peripheral.
Seed collecting:
Collect fruits that are starting to dry or and turn brown. Fruits can be collected directly from the bush or from the ground underneath
Seed cleaning:
Place the fruits in a tray and leave to dry for one to two weeks. No cleaning is required if only the fruits are collected. The seed can be stored in the fruit or can be cleaned further. Rub the fruit gently by hand to dislodge the seeds. Use a sieve to separate the 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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
August 2014100%15d24d None
1% water agar
Incubated under spring/autumn conditions
August 201492%7d15d Fruit removed
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)