Seeds of South Australia
Trianthema triquetra (Aizoaceae)
Small Hogweed
List of species for Trianthema
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Seed collecting:
January to December
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
Olary Spur (FLB03)Flinders Lofty Block
 Least Concern   [Comes up after heavy rain in creek beds; can be moved by stock. Dries off quickly & breaks off in wind.]
Northern Flinders (FLB05) 
 Least Concern
Central Flinders (FLB06) 
 Least Concern
Gawler Lakes (GAW03)Gawler
 Near Threatened   [edge of range]
Arcoona Plateau (GAW04) 
 Near Threatened   [edge of range]
Kingoonya (GAW05) 
 Near Threatened   [edge of range]
Torrens (GAW06) 
 Least Concern
Roxby (GAW07) 
 Least Concern
Commonwealth Hill (GAW08) 
 Least Concern
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))
Kintore (GVD04) 
 Least Concern
Tallaringa (GVD05) 
 Least Concern
Barrier Range Outwash (BHC04)Broken Hill Complex
 Least Concern   [Comes up after heavy rain in creek beds; can be moved by stock. Dries off quickly & breaks off in wind.]
Bimbowrie (BHC05) 
 Least Concern   [Comes up after heavy rain in creek beds; can be moved by stock. Dries off quickly & breaks off in wind.]
Curnamona (BHC06) 
 Least Concern   [Comes up after heavy rain in creek beds; can be moved by stock. Dries off quickly & breaks off in wind.]
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern
Dieri (SSD03) 
 Least Concern
Warriner (SSD04) 
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Least Concern
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
Diamantina-Eyre (CHC04) 
 Least Concern
Coongie (CHC06) 
 Least Concern
Lake Pure (CHC07) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Everard Block (CER03) 
 Least Concern
Tieyon (FIN03)Finke
 Least Concern
Pedirka (FIN04) 
 Least Concern
IBRA regions
3 of 6 subregionsFlinders Lofty BlockLeast Concern
6 of 8 subregionsGawlerLeast Concern
, Near Threatened
3 of 4 subregionsGreat Victoria DesertLeast Concern
, Rare
3 of 4 subregionsBroken Hill ComplexLeast Concern
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
7 of 7 subregionsStony PlainsLeast Concern
4 of 4 subregionsChannel CountryLeast Concern
2 of 3 subregionsCentral RangesLeast Concern
2 of 2 subregionsFinkeLeast 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 Trianthema]
Name derivation:
Trianthema from the Greek 'treis' meaning three and 'anthemon' meaning flower; referring to the flowers sometimes growing in 3's in the axils of the leaves. Triquetra from the Latin 'triquetrus' meaning three edged or three angled.
Found in the northern part of South Australia, growing on sandy soil. Also found in Western Australia, Northern Territory, Queensland and New South Wales.
Native. Common in South Australia. Common in the other states.
Plant description:
Prostrate or ascending, diffuse herb with stems to 60 cm long with short lateral branches, finely warty or glabrous. Leaves terete to clavate or oblanceolate to linear, leaf blade to 30 mm long and 4 mm wide, petiole to 2 mm long, expanded into a toothed sheath. Flower white to pink. Flowers throughout the year.
Fruit type:
Small brown capsule to 2 mm long, enclosed in the perianth, thickened and cup-shaped at the summit, with the style in the middle of the depression.
Seed type:
Dark brown to black reinform seed to 1.2 mm long and 1 mm wide, with wrinkled surface.
Embryo type:
Seed collecting:
Collect capsules that are maturing, turning brown and contain hard dark seeds. Collection individual capsules or break off whole stems.
Seed cleaning:
Place the capsules/stems in a tray for a week to dry. Then rub the capsules gently with your hands to dislodge the seeds. Use a sieve to separate 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 average, at 60%.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA16000 (15.13 g)304-Apr-2007RJB71359
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.