Seeds of South Australia
Zygophyllum prismatothecum (Zygophyllaceae)
Square-fruit Twinleaf
List of species for Zygophyllum
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Seed collecting:
August to February
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [Edge of range]
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
Myall Plains (GAW01)Gawler
 Rare   (IUCN: RA d(ii))   [southern limit]
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))   [southern limit]
Arcoona Plateau (GAW04) 
 Least Concern   [southern limit]
Kingoonya (GAW05) 
 Least Concern   [southern limit]
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern
Curnamona (BHC06)Broken Hill Complex
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Warriner (SSD04)Simpson Strzelecki Dunefields
 Near Threatened
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Near Threatened
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Least Concern
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Everard Block (CER03)Central Ranges
 Rare   (IUCN: RA d(i,ii))
Tieyon (FIN03)Finke
 Least Concern
IBRA regions
DISPLAY ALL
3 of 6 subregionsFlinders Lofty BlockLeast Concern
, Rare
6 of 8 subregionsGawlerLeast Concern
, Rare
Curnamona (BHC06)Broken Hill ComplexRare
  (IUCN: RA d(i,ii))   [edge of range]
2 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
, Near Threatened
7 of 7 subregionsStony PlainsLeast Concern
, Near Threatened
Sturt Stony Desert (CHC02)Channel CountryLeast Concern
Everard Block (CER03)Central RangesRare
  (IUCN: RA d(i,ii))
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 Zygophyllum]
Name derivation:
Zygophyllum from the Greek 'zygon' meaning pair and 'phyllon' meaning leaf; referring to the pair of leaflets making up each leaf. Prismatothecum from Greek meaning prism-like or angular; referring to the fruit.
Distribution:
Found in the north-eastern side in South Australia, growing on barren ground, often on salty brown gibber soil. Also found in the Northern Territory and New South Wales.
Status:
Native. Common in South Australia. Uncommon in New South Wales. Common in the Northern Territory.
Plant description:
Small spreading annual shrub. Leaflets cuneate, rounded at the apex, continuous with the cuneate petiole, forming an apically 2-lobed leaf. Flowers almost sessile, sepals 4, petals 4, oblanceolate, to 3 mm long, about as long as the sepals, more or less acute at the apex, yellow. Flowering between June and November.
Fruit type:
Stalk-less narrow-oblong capsule to 15 mm long, obtusely 4-angled, densely white hairs in the longitudinal grooves between the angles with seeds 2 or 3 in each cell. 
Seed type:
Brown ovoid seeds to 3 mm long and 1.5 mm wide.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect semi-dried and dried capsules by running your hands through the stems of the plant. Mature fruits will come off easily and will have a hard and dark seed inside each segment.
Seed cleaning:
Place the capsules in a tray and leave to dry for 1 to 2 weeks, depending on the greeness of the fruit. Then rub the dried capsules to dislodge the seeds. Use a sieve to remove 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.
Seed viability:
From two collections, the seed viability were high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA10000 (17.74 g)100+5-Oct-2010TST1017
Lake Eyre
1-Jan-2012100%-18°C
BGA3200 (5.46 g)200+20-Aug-2010KHB455
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.