Seeds of South Australia
Gonocarpus humilis (Haloragaceae)
Shade Raspwort
List of species for Gonocarpus
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Seed collecting:
November to February
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Near Threatened   [likes acid soils in swamps; stronghold]
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [likes acid soils in swamps]
Glenelg Plain (NCP02) 
 Least Concern   [Troy has more records]
Lucindale (NCP03) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [edge of range]
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 Gonocarpus]
Name derivation:
Gonocarpus from the Greek 'gonia' meaning angle, corner and 'carpos' meaning fruit; referring to its ribbed fruits. Humilis means dwarf, small; referring to the small habit, compared to the other species. 
Found in the lower South-east in South Australia, growing in cool, damp places. Also found in Queensland, New South Wales, Victoria and Tasmania.
Native. Rare in South Australia. Common in the other states.
Plant description:
Prostrate or semi-prostrate perennial herb to 30 cm high with weakly 4-ribbed, hairy stems to 70 cm long. Leaves decussate, opposite, ovate, to 20 mm long and 12 mm wide, densely hair, short stalk and toothed margin. Inflorescence a leafy-spike at terminal of stems with numerous yellow-green flowers. Flowering between October and December.
Fruit type:
Small silver-grey to purplish ovoid fruit to 1.5 mm long and 1 mm wide, with 8-ribbed and 3 calluses between the ribs, scabrous surface.
Seed type:
Considered the same as the fruit.
Seed collecting:
Collect maturing fruits, those that are fat and turning grey-purple, by running your hands along the fruit-spikes.
Seed cleaning:
Place the fruit in a tray and leave to dry for 1 to 2 weeks. No further cleaning is required if only fruits were collected. If collected with other material, 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 80%.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
4500 (2.08 g)
4500 (2.08 g)
South Eastern
19-Sep-200880%+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.