Seeds of South Australia
Zygophyllum aurantiacum ssp. simplicifolium (Zygophyllaceae)
Undivided Twinleaf
List of species for Zygophyllum
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Seed collecting:
September to November
Herbarium regions:
Lake Eyre, Nullarbor, Gairdner-Torrens, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
SUMMARY
Northern Flinders (FLB05)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))
Talia (EYB04)Eyre Yorke Block
 Rare   (IUCN: RA d(ii))
Eyre Mallee (EYB05) 
 Least Concern
Gawler Volcanics (GAW02)Gawler
 Rare   (IUCN: RA d(ii))
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))
Roxby (GAW07) 
 Rare   (IUCN: RA d(ii))
Commonwealth Hill (GAW08) 
 Rare   (IUCN: RA d(ii))
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06) 
 Rare   (IUCN: RA d(ii))
Nullarbor Plain (NUL02)Nullarbor
 Rare   (IUCN: RA d(ii))
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Rare   (IUCN: RA d(ii))
Dieri (SSD03) 
 Rare   (IUCN: RA d(ii))
Murnpeowie (STP03)Stony Plains
 Rare   (IUCN: RA d(ii))
IBRA regions
DISPLAY ALL
Northern Flinders (FLB05)Flinders Lofty BlockRare
  (IUCN: RA d(ii))
2 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
5 of 8 subregionsGawlerRare
2 of 4 subregionsGreat Victoria DesertRare
Nullarbor Plain (NUL02)NullarborRare
  (IUCN: RA d(ii))
2 of 4 subregionsSimpson Strzelecki DunefieldsRare
Murnpeowie (STP03)Stony PlainsRare
  (IUCN: RA d(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 Zygophyllum]
Name derivation:
Zygophyllum from the Greek 'zygon' meaning pair and 'phyllon' meaning leaf; referring to the pair of leaflets making up each leaf. Aurantiacum from the Latin 'aurantiacus' meaning yellow-orange. Simplicifolium from the Latin 'simplix' meaning simple or undivided and 'folium' meaning leaf; referring to its undivided leaves, except near the tip.
Distribution:
Found scattered across the northern part of south australia, growing on the slopes of sand dunes at edges of salt lakes, usually in highly gypsiferous areas. Also found in the Northern Territory.
Status:
Native. Uncommon in south Australia. Rare in the Northern Territory.
Plant description:
Low and spreading or upright and rounded perennial shrub to 100 cm high. Leaves simple (petiolate only), linear, subterete, to 40 mm long and 1.7 mm wide, rounded, truncate or emarginate at apex, sometimes with very short lobes (less than 5 mm long). Inflorescence solitary on each node with yellow flowers. This subspecies differ from the other three subspecies found in South Australia, by having the simple leaves, lacking leaflets or only very shortly lobed at apex, paired at each node. Flowering between July and September.
Fruit type:
Yellow-brown round, four segmented capsule with papery wings, separating into 4 segments, each contains one seed.
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.