Plants of
South Australia
Hibbertia hirsuta
Dilleniaceae
Hairy Guinea-flower
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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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Etymology

Hibbertia named after George Hibbert (1757-1837), a London merchant who maintained a private botanic garden at Chelsea. Hirsuta from the Latin 'hirsutus' meaning hairy, referring to the species being covered in rough, short stiff hairs.

Distribution and status

Found along Meadows Creek in South Australia, growing on clay soils on flats near creek line. Also found in Tasmania. Native. Very rare in South Australia. Uncommon in Tasmania.
Herbarium region: Southern Lofty
NRM region: Adelaide and Mount Lofty Ranges
AVH map: SA distribution map (external link)

Plant description

Prostrate to scrambling shrub to 15 cm tall; moderately branched, branches thin ­wiry, with leaf bases scarcely raised and scarcely decurrent; pilose but soon glabrescent, covered on many parts with persistent hairs. Leaves narrowly elliptic to rarely linear, to 6.4 mm long and 1.6 mm wide; gradually tapering into petiole; acute, rarely obtuse; above grooved to incurved and pilose; below exposing a tomentose undersurface between the slightly revolute margins and a narrow central vein which is often visible to the leaf apex. Flowers small with one or two inconspicuous narrow yellow petals and stamens. Flowering between September and October. The vegetative part of this species is very similar to other small species of Hibbertia, however, it is easily distinguishable by having only one or two petals and stamens. Fruits are brown ovoid capsule with two seeds. Seeds are brown, globular seed to 1.5 mm diameter.

Seed collection and propagation

Collect seeds between November and December. Collect mature capsules that are turning a pale straw-colour and contain brown seeds. Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules gently by hand 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. From one collection, the seed viability was high, at 100%. This species has morpho-physiological dormancy and can be difficult to germinate.

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
1,700 (2.44 g)
1,700 (2.44 g)
30+27-Nov-2014DJD3071
Southern Lofty
1-Jan-2016100%-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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