Seeds of South Australia
Bergia diacheiron (Elatinaceae)
Clasping Water-fire
List of species for Bergia
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Herbarium region:
Lake Eyre
NRM region:
South Australian Arid Lands
IBRA regions
Strzelecki Desert (SSD05)Simpson Strzelecki Dunefields
 Near Threatened
Coongie (CHC06)Channel Country
 Near Threatened
Lake Pure (CHC07) 
 Near Threatened
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 Bergia]
Name derivation:
Bergia named after Dr Petter Jonas Bergius (1730-90), Swedish physician and botanist. Diacheiron refers to the character of the prominent bracteoles clasping and partially enclosing the flower.
Found in the north central and north-eastern parts of South Australia, growing on sandy, gravelly or clay soils. Also found in the Northern Territory and Queensland.
Native. Uncommon in South Australia. Uncommon in the Northern Territory. Common in Queensland.
Plant description:
Prostrate perennial herb. Indumentum of eglandular hairs or lacking. Leaves elliptic, to 5.5 mm long and 2.5 mm wide, acute or rarely mucronate, glabrous, margin serrate, venation obscure. Stipules to 2 mm long and 1 mm wide. Flowers solitary, sessile. Bracteoles appressed to and shorter than calyx, elliptic, to 2 mm long and 0.6 mm wide, margin broad, white, fimbriate. Sepals 5, ovate, to 2.2 mm long and 1.2 mm wide, acuminate, glabrous or sparsely pubescent, green, margin broad, white, laciniate, keel obscure or absent. Petals 5, narrow-obovate, to 2.5 mm long and 0.7 mm wide, obtuse, rarely mucronate, longer than sepals, erect at anthesis. Stamens 3-5, to 1 6 mm long, filament flattened, dilated at base.
Fruit type:
Globular capsule to 1.2 mm diameter, 3-locular.
Seed type:
Seed collecting:
Collect stems with maturing capsules, those that are fat, drying off and contain brown seeds.
Seed cleaning:
Place the stems in a tray and leave to dry for one to two weeks. Then rub the plant especially the capsules gently by hand to dislodge the seeds. Use a fine sieve to separate the unwanted material. Be very careful as the seeds are very small. 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.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA7700 (0.21 g)29-Sep-2007Bloodwood Bore
Lake Eyre
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.