Plants of
South Australia
Pseudanthus micranthus
Euphorbiaceae
Fringed Pseudanthus
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
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Oodnadatta
Renmark
Wudinna
Keith
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Botanical art

Kath Alcock paintings: 3.

Etymology

Pseudanthus from the Greek 'pseudes' meaning false and 'anthos' meaning a flower; referring to the tyre species Pseudanthus pimeleoides, which has small flowers clustered at the summit of the branchlets resembling one showy flower. Micranthus from the Greek 'micros' meaning small and 'anthos' meaning flower; alluding to the species tiny flowers.

Distribution and status

Endemic to South Australia and found on Kangaroo Island and the Fleurieu Peninsula, growing in woodlands or heathlands. Native. Rare in South Australia.
Herbarium regions: Southern Lofty, Kangaroo Island
NRM regions: Adelaide and Mount Lofty Ranges, Kangaroo Island
AVH map: SA distribution map (external link)

Plant description

Dwarf shrubs to 20 cm high with a woody tap root, reddish stems covered in minutely short stiff thick hairs. Leaves alternate, glabrous, orbicular or ovate, to 6 mm long and 2.5 mm wide. Inflorescence yellow with a reddish pink or reddish brown margin with male flowers in axils on terminal leafy shoots, several to many and female flowers solitary, scattered among males. Flowers throughout the year. Fruits are yellowish green becoming tinged red with age, ovoid capsule to 5.5 mm long with 1-cell and 1 seed, smooth or slightly rugose. Seeds are brown ovoid seed to 3 mm long and 2.5 mm wide, smooth, shiny. Seed embryo type is spatulate fully developed.

Seed collection and propagation

Collect seeds between January and December. Collect individual capsule by hand, those that are fat, red and contain dark, hard seed. Place the capsules in a tray and leave to dry for one to two weeks. Then gently rub the capsules with a rubber bung to dislodge the seeds. Use a sieves 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 can be variable and seeds. From one collection, the seed viability was high, at 90%.

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
1,350 (10.89 g)
1,350 (10.89 g)
50+7-Nov-2006DJD501
Southern Lofty
1-Aug-200790%+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.