Seeds of South Australia
Zygophyllum angustifolium (Zygophyllaceae)
Scrambling Twinleaf
List of species for Zygophyllum
Click on an image to enlarge it
Seed collecting:
September to April
Herbarium regions:
Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula
NRM regions:
Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Olary Spur (FLB03)Flinders Lofty Block
 Least Concern
Southern Flinders (FLB04) 
 Least Concern
Northern Flinders (FLB05) 
 Data Deficient   [not typical habitat; outlier]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   [similar to a few other Zygo's]
St Vincent (EYB02) 
 Least Concern   [similar to a few other Zygo's]
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Rare   (IUCN: RA d(i,ii))
Eyre Mallee (EYB05) 
 Least Concern
South Olary Plain (MDD01)Murray Darling Depression
 Least Concern
Murray Mallee (MDD02) 
 Least Concern
Braemer (MDD07) 
 Least Concern
Murray Scroll Belt (RIV06)Riverina
 Near Threatened
Myall Plains (GAW01)Gawler
 Least Concern
Gawler Volcanics (GAW02) 
 Least Concern
Gawler Lakes (GAW03) 
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06)Great Victoria Desert
 Least Concern
Nullarbor Plain (NUL02)Nullarbor
 Least Concern
Yalata (NUL03) 
 Least Concern
Hampton (HAM01)Hampton
 Least Concern
IBRA regions
DISPLAY ALL
3 of 6 subregionsFlinders Lofty BlockLeast Concern
, Data Deficient
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Rare
3 of 6 subregionsMurray Darling DepressionLeast Concern
Murray Scroll Belt (RIV06)RiverinaNear Threatened
3 of 8 subregionsGawlerLeast Concern
, Rare
Yellabinna (GVD06)Great Victoria DesertLeast Concern
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 Zygophyllum]
Name derivation:
Zygophyllum from the Greek 'zygon' meaning pair and 'phyllon' meaning leaf; referring to the pair of leaflets making up each leaf. Angustifolium from the Latin 'agustus' meaning narrow and 'folium' meaning leaf.
Distribution:
Found in the central part of South Australia, growing in mallee scrub on calcareous soils. Also found in Western Australia, New South Wales and Victoria.
Status:
Native. Common in South Australia. Rare in Victoria. Uncommon in Western Australia and New South Wales.
Plant description:
Weak ascending perennial subshrub to 60 cm high with slender stems, sometimes scrambling over taller plants. Leaves fleshy and 'Y'-shaped to 40 mm long, green; leaflets linear to narrow oblong-elliptic to 25 mm long and 4 mm wide, fleshy. Flowers pale yellow with 4 sepals and 4 petals. Flowering between June and February.
Fruit type:
Pale brown 4-angled capsule to 9 mm long, drooping, truncate at apex with a short point, containing 1 or 2 seeds per cell.
Seed type:
Dark brown wedge-shaped seeds to 3.5 mm long and 2 mm wide, with a mesh-like surface.
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 greenness 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 one collection, the seed viability was high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
1900 (6.34 g)
1900 (6.34 g)
50+15-Oct-2007TST188
Eyre Peninsula
19-Sep-2008100%-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.