Plants of
South Australia
Hibbertia tenuis
Dilleniaceae
Yundi 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
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Coober Pedy
Hawker
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Botanical art

Kath Alcock painting: 1.

Etymology

Hibbertia named after George Hibbert (1757-1837), a London merchant who maintained a private botanic garden at Chelsea. Tenuis from the Latin 'tenuis' meaning thin, slender; referring to its more delicate and slender habit in comparison to Hibbertia australis.

Distribution and status

Endemic to South Australia and found in the vicinity of Mt Compass, growing in low or open vegetation in permanent wet places. Native. Very rare in South Australia.
Herbarium region: Southern Lofty
NRM region: Adelaide and Mount Lofty Ranges
AVH map: SA distribution map (external link)

Plant description

Shrublets with procumbent to scrambling, hairy branches to 50 cm longcovered in hairs. Leaves without axillary tuft of hairs, petiole to 0.5 mm long. Leaves linear, to 12.2 mm long and 1.5 mm wide, obtuse to rounded with abruptly constricted apex of central ridge recurved and scarcely protruding, abruptly constricted into petiole, above convex and puberulous with hairs with 1-3, usually forward-directed branches, below with central ridge much broader than revolute margins and puberulous with muchbranched hairs. Flowers mid to bright yellow, on filiform peduncle to 18 mm long and recurved after flowering, terminal on long and short shoots but usually leaf-opposed due to sympodial growth, with linear or linear-lanceolate bracts. Flowers throughout the year like most species of Hibbertia growing in permanent moist places. Fruits are brown capsule with 2 carpels , puberulous, recurved with erect styles attached to the dorsal apex. Seeds are red to brown ovoid seed to 2.3 mm long and 1.5 mm wide.

Seed collection and propagation

Collect seeds between January and December. Collect mature capsules, those 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. This genus tend to have low seed viability. From one collection, the seed viability was high, at 85%. This species has morphophysiological 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
BGA22063-Jan-2008DJD1041
Southern Lofty
1-Jan-2012 -18°C
BGA670 (1.47 g)2113-Mar-2014DJD3092
Southern Lofty
1-Jan-201685%-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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