Seeds of South Australia
Eucalyptus socialis ssp. viridans (Myrtaceae)
Green-leaved Red Mallee
List of species for Eucalyptus
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Seed collecting:
January to December
Herbarium regions:
Eyre Peninsula, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
Tintinara (NCP04)Naracoorte Coastal Plain
 Least Concern
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU D2)   [at risk from roadworks]
Fleurieu (KAN02) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [edge of range; not known if still here]
Eyre Hills (EYB03)Eyre Yorke Block
 Least Concern   [now ssp viridans. Some peninsularis & yumbarrana records should fall into this sp]
Talia (EYB04) 
 Least Concern   [now ssp viridans. Some peninsularis & yumbarrana records should fall into this sp]
Eyre Mallee (EYB05) 
 Least Concern   [now ssp viridans. Some peninsularis & yumbarrana records should fall into this sp]
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(ii))   [edge of range]
Lowan Mallee (MDD04) 
 Rare   (IUCN: RA d(ii))   [taxonomic issues]
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 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. Socialis from the Latin 'socialis ' meaning friendly; alluding to the species being associated with other eucalyptus species. Viridans from the Latin 'viridis' meaning green; referring to the green colour of the leaves compared to the other subspecies.
Distribution:
Endemic to South Australia and found on Eyre Peninsula, Yorke Peninsula, Kangaroo Island and the southern Murray mallee, growing in mallee vegetation on calcareous shallow grey sands to loam over limestone.
Status:
Native. Common in South Australia.
Plant description:
Multi-stemmed mallee to 8 m high with rough, flaky-fibrous, grey to brown bark on lower stems and smooth, tan to pinkish-grey to cream bark above. Young branchlets not waxy. Juvenile leaves ovate to lanceolate, not waxy, dull to slightly glossy, green to slightly blue-green. Adult leaves to 132 mm long and 28 mm wide, narrow-lanceolate to lanceolate, glossy, green. Flowers in groups of 7-11 in leaf axils. Buds to 18 mm long and 56 mm wide, not waxy, bud-cap horn-shaped, equal in width and longer than the base. Flower cream white to creamy-yellow. This subspecies is distinguished from the other three subspecies that occurs in South Australia by its distribution, green juvenile leaves, glossy green adult leaves and non-waxy features.
Fruit type:
Round to barrel-shaped to urn-shaped fruit to 18 mm long and 6 mm wide, not waxy, disc descending, valves 3-5 below the rim.
Seed type:
Brown ovoid seed to 4 mm long and 2 mm wide, with finely reticulated 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 high, at 100%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA1267 (1.47 g)20+30-Aug-2014DJD2989
Eyre Peninsula
24-Mar-2015100%-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
August 201453%14d21d None
1% water agar
12 hours  /  20 °C C 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)