Seeds of South Australia
Zygophyllum hybridum (Zygophyllaceae)
Hibrid Twinleaf
List of species for Zygophyllum
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Seed collecting:
July to December
Herbarium regions:
Lake Eyre, Flinders Ranges
NRM region:
South Australian Arid Lands
IBRA regions
Dieri (SSD03)Simpson Strzelecki Dunefields
 Rare   (IUCN: RA d(i,ii))   [gypseous flats; endemic to SA]
Oodnadatta (STP02)Stony Plains
 Rare   (IUCN: RA d(ii))   [gypseous flats; endemic to SA]
Murnpeowie (STP03) 
 Rare   (IUCN: RA d(i,ii))   [gypseous flats; restricted habitat]
Witjira (STP06) 
 Rare   (IUCN: RA d(i,ii))   [gypseous flats; endemic to SA]
Baltana (STP07) 
 Near Threatened   [gypseous flats; endemic to 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 Zygophyllum]
Name derivation:
Zygophyllum from the Greek 'zygon' meaning pair and 'phyllon' meaning leaf; referring to the pair of leaflets making up each leaf. Hybridum from the Latin 'hybrida' meaning hybrid or mongrel and is derived from Greek for insult or outrage, with special reference to lust, hence, an outrage on nature, a mongrel; possibly referring to the hybrid colours of the plant (yellow-green) and fruit (maroon).
Endemic to South Australia and found in the north central part, growing on clay soil of gibber plains, but only appears in very wet years. 
Native. Uncommon in South Australia. 
Plant description:
Erect annual herb to 20 cm high. Leaves fleshy, leaflets oblong, to 20 mm long, with a broad lobe on the outer side of the base, obtuse at the apex. Inflorescence solitary at each node with yellow flower on a long stalk. Flowering between May and October.
Fruit type:
Maroon (maturing to brown) oblong capsule to 10 mm long, rounded at both ends, with 5-angles, on a long erect stalk.
Seed type:
Brown ovoid seed to 4 mm long and 2 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 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)
of plants
Collection number
Collection location
% ViabilityStorage
11000 (39.68 g)
11000 (39.68 g)
Lake Eyre
1-Jan-2012100%+5°C, -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.