Seeds of South Australia
Eucalyptus sp. Great Victoria Desert (D.Nicolle 3877) (Myrtaceae)
GVD Narrow-leaf Red Mallee
List of species for Eucalyptus
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Seed collecting:
January to December
Herbarium regions:
North Western, Nullarbor, Gairdner-Torrens, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Eucalyptus]
Name derivation:
Eucalyptus from the Greek 'eu' meaning well and 'calyptos' meaning covered; alluding to the cap or lid which covers the stamens in the bud. The species is un-named and the phrase name refer to its distribution in the Great Victoria Desert.
Distribution:
Found in the northern Eyre Peninsula across to the Great Victoria Desert in South Australia, growing on red to pale yellow sands in mallee shrubland vegetation. Also found in Western Australia.
Status:
Native. Uncommon in South Australia. Uncommon in Western Australia.
Plant description:
Multi-stemmed mallee to 6 m tall with loose rough bark at the base and smooth coppery to cream bark above and a mix of juvenile and adult leaves in the crown. Juvenile leaves ovate to orbicular, pruinose, bluish. Adult leaves to 90 mm long and 12 mm wide, narrow lanceolate to linear, glossy green. Inflorescences axillary in groups of 7-13 white flowers. Buds to 7 mm long and 5 mm wide, bud cup conical equal in length to the base. Similar to Eucalyptus leptophylla which has smooth bark, less waxy juvenile leaves and has only adult leaves in the mature crown.
Fruit type:
Cup-shaped to barrel-shaped fruit to 6 mm long and 96 mm wide, disc descending, valves 3-4 below rim.
Seed type:
Grey-brown ovoid seed to 4 mm long and 2 mm wide, with fine wrinkled surface.
Embryo type:
Folded.
Seed collecting:
Collect mature fruits that are dark and hard (difficult to break with a finger nail), with the valves un-open any time of year.
Seed cleaning:
Leave the fruits in a breathable container in a dry room for one to two weeks. This allows the valves on the fruit to open and release the seeds. Separate the seeds by placing all the materials into a bucket and shaking it to dislodge the seeds. Pass the material through a sieve to separate the unwanted material. The finer material will contain both seeds (soft) and frass (hard) usually distinguishable from each other but can be very similar in shape and colour. With finer sieves, the seeds can be separated from the frass but this is not essential for storage or propagation. 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:
From one collection, the seed viability was average, at 63%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
July 201563%7d7d None
1% water agar
12 hrs light / 12 hrs dark  /  200C constant
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)