Plants of
South Australia
Pimelea williamsonii
Thymelaeaceae
Williamson's Riceflower
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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
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock painting: 1.

Etymology

Greek 'pimele' fat, alluding to the fleshy cotyledons and

Distribution and status

Sandy soils and disturbed sites, often observed post-fire Rare
Herbarium regions: Eyre Peninsula, Murray
NRM regions: Eyre Peninsula, South Australian Murray-Darling Basin
AVH map: SA distribution map (external link)

Plant description

Wooly subshrub to 30cm tall. Leaves elliptic, 2.5-16 mm long, 1-5 mm wide, acute to obtuse, lower surface with coarse antrorse white or colourless hairs and the upper surface with fewer and finer hairs. Inflorescence a terminal spike to 6.5cm long. Flowers bisexual, white, 3.5-5 mm long. Flowering most of the year. Seeds are seed ventricose, hooked at the apex, glabrous, black, finely reticulate 1-5mm

Seed collection and propagation

Collect seeds between November and December.

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
2,100 (1.18 g)
2,100 (1.18 g)
50+16-Nov-2010DEM7055
South Eastern
1-Jan-201295%-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.
Germination table:
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