Seeds of South Australia
Hibbertia glaberrima (Dilleniaceae)
Central Australian Guinea-flower
List of species for Hibbertia
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Seed collecting:
January to December
Herbarium region:
North Western
NRM region:
Alinytjara Wilurara
IBRA region
Mann-Musgrave Block (CER01)Central Ranges
 Rare   (IUCN: RA d(ii))
Everard Block (CER03) 
 Rare   (IUCN: RA d(i,ii))
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Hibbertia]
Name derivation:
Hibbertia named after George Hibbert (1757-1837), a London merchant who maintained a private botanic garden at Chelsea. Glaberrima meaning most glabrous; referring to the species being devoid of hairs.
Distribution:
Foun din the far north-western corner of South Australia, growing on rocky soil in rocky areas. Also found in Western Australia and the Northern Territory.
Status:
Native. Rare in South Australia. Uncommon in the other states.
Plant description:
Glabrous spreading shrub to 50 cm high. Leaves linear-oblong to lanceolate or linear-elliptic, slightly recurved at the tip, usually to 100 mm long and 12 mm wide. Flowers yellow, large to 3 cm across, on solitary peduncles, single bract at the base of the calyx, linear, leaf-like but shorter than the sepals. Flowers throughout the year.
Fruit type:
Brown capsule with 3 carpels and 6-9 ovules in each, glabrous.
Seed type:
Brown, globular seed to 2.1 mm diameter.
Seed collecting:
Collect mature capsules, those that are turning a pale straw colour and contain brown seeds.
Seed cleaning:
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
Seed viability:
This genus tend to have low seed viability. From one collection, the seed viability was average, at 65%.
Seed germination:
This species has morphophysiological dormancy and can be difficult to germinate.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
2550 (9.05 g)
2550 (9.05 g)
20+4-Sep-2013DJD 2693
North Western
24-Mar-201565%-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:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Sep-1436%29 dNA 500 mg/L gibberellic acid 24 h;
filter paper over moist sand;
Incubated under spring/autumn conditions
Sep-142%46 dNA dry heat 90 °C oven 15 minutes, 500 mg/L gibberellic acid + 10% smoke water 24 h;
filter paper over moist sand;
Incubated under spring/autumn conditions
Sep-142%35 dNA dry heat 90 °C oven 15 minutes, 500 mg/L gibberellic acid 24 h;
filter paper over moist sand;
Incubated under spring/autumn conditions
Sep-140%NANA dry heat 90 °C oven 15 min, 10% smoke water 24 h;
filter paper over moist sand;
Incubated under spring/autumn conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)