Seeds of South Australia
Alternanthera angustifolia (Amaranthaceae)
Narrow-leaf Joyweed
List of species for Alternanthera
Click on an image to enlarge it
Seed collecting:
January to December
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Eastern
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Rare   (IUCN: RA d(i))   [Concern not come up in surveys taxo problem, southern edge of range]
Roxby (GAW07)Gawler
 Near Threatened   [ephemeral in SA]
Tallaringa (GVD05)Great Victoria Desert
 Near Threatened   [ephemeral in SA]
Bimbowrie (BHC05)Broken Hill Complex
 Rare   (IUCN: RA d(i))   [Concern not come up in surveys taxo problem, southern edge of range]
Warriner (SSD04)Simpson Strzelecki Dunefields
 Near Threatened   [ephemeral in SA]
Strzelecki Desert (SSD05) 
 Near Threatened   [ephemeral in SA]
Breakaways (STP01)Stony Plains
 Least Concern   [ephemeral in SA]
Oodnadatta (STP02) 
 Least Concern   [ephemeral in SA]
Murnpeowie (STP03) 
 Near Threatened   [ephemeral in SA]
Macumba (STP05) 
 Least Concern   [ephemeral in SA]
Witjira (STP06) 
 Least Concern   [ephemeral in SA]
Baltana (STP07) 
 Least Concern   [ephemeral in SA]
Sturt Stony Desert (CHC02)Channel Country
 Least Concern   [ephemeral in SA]
Diamantina-Eyre (CHC04) 
 Near Threatened   [ephemeral in SA]
Coongie (CHC06) 
 Near Threatened   [ephemeral in SA]
Lake Pure (CHC07) 
 Near Threatened   [ephemeral in SA]
Everard Block (CER03)Central Ranges
 Near Threatened   [ephemeral in SA]
Pedirka (FIN04)Finke
 Near Threatened   [ephemeral in SA]
IBRA regions
DISPLAY ALL
Olary Spur (FLB03)Flinders Lofty BlockRare
  (IUCN: RA d(i))   [Concern not come up in surveys taxo problem, southern edge of range]
Roxby (GAW07)GawlerNear Threatened
  [ephemeral in SA]
Tallaringa (GVD05)Great Victoria DesertNear Threatened
  [ephemeral in SA]
Bimbowrie (BHC05)Broken Hill ComplexRare
  (IUCN: RA d(i))   [Concern not come up in surveys taxo problem, southern edge of range]
2 of 4 subregionsSimpson Strzelecki DunefieldsNear Threatened
6 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
4 of 4 subregionsChannel CountryLeast Concern
, Near Threatened
Everard Block (CER03)Central RangesNear Threatened
  [ephemeral in SA]
Pedirka (FIN04)FinkeNear Threatened
  [ephemeral in SA]
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 Alternanthera]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
Alternanthera from the Latin 'alternus' meaning alternate and 'anthera' meaning anthers, referring to the filaments without anthers often alternate with fertile stamens. Angustifolia from the Latin 'angustus' meaning narrow and 'folium' meaning leaf, referring to the narrow leaf of the species.
Distribution:
Found in the north and north-eastern parts of South Australia growing in sandy soil on creeks and river banks. Also found in Western Australia, Northern Territory, Queensland and New South Wales.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Prostrate or decumbent annual herbs with glabrous or sparsely hairy leaves, oblong to narrow-obovate to 5 cm long. Flowers white in cylindrical spike. Flowers throughout the year.
Fruit type:
Pale brown, semi-flat fruit to 2 mm long with 5 papery bracts and covered in hairs.
Seed type:
Orange to brown reniform seed to 1.5 mm long.
Embryo type:
Peripheral.
Seed collecting:
Collect mature fruits, those that are turning a pale straw colour and contain very small brown seeds. Can collect individual spike or break off the whole stem.
Seed cleaning:
Place the fruit in a tray and leave to dry for two weeks. Then rub the fruits gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Be careful as the seeds are very small, less than 2mm across. 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:
Not all fruit will contain a seed. From one collection, the seed viability was high, at 90%. 
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
BGA18000 (10.64 g)20+9-May-2007RJB71593
Lake Eyre
19-Sep-200895%-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.