Plants of
South Australia
Gonocarpus tetragynus
Haloragaceae
Common Raspwort
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Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock paintings: 6.

Etymology

Gonocarpus from the Greek 'gonia' meaning angle, corner and 'carpos' meaning fruit, referring to its ribbed fruits. Greek 'tetra' meaning four and 'gynes' meaning a woman, referring to its ovary with 4 chambers (locules).

Distribution and status

Found in south-eastern South Australia, from the Flinders Ranges to the lower South-east growing in the understorey of dry sclerophyll forest, scrubland and heathland. Also found in Queensland, New South Wales, Victoria and Tasmania. Native. Common in South Australia. Common in the other States.
Herbarium regions: Flinders Ranges, Northern Lofty, Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
AVH map: SA distribution map (external link)

Plant description

Erect or ascending perennial herb to 30 cm tall with smooth or weakly 4-ribbed, scabrous stems. Leaves opposite, lanceolate, 12 mm long x 7 mm; margins thickened, serrate with 4-8 short teeth; strigose. Inflorescence a leafy-spike at he tip stems, with numerous green to red flowers with 8 stamens; ovary with 4-locules. Flowering between October and January. Fruits are small silver-grey ellipsoid fruit to 1.5 mm long and 1 mm wide, with 8-ribbed and 2-3 calluses between the ribs; glabrous or scabrous surface. Seeds are considered the same as the fruit.

Seed collection and propagation

Collect seeds between November and March. Collect maturing fruits, those that are fat and turning grey, by running your hands along the fruit-spikes. 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.

Germination table:
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