Seeds of South Australia
Eucalyptus minniritchi (Myrtaceae)
Centralian Minniritchi Mallee
List of species for Eucalyptus
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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
 Vulnerable   (IUCN: VU D2)   [highly localised; on top of rocky hills]
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. Minniritchi is of Aboriginal origin and refers to the distinctive reddish longitudinally-peeling bark of the species.
Distribution:
Found in the far north-west part of South Australia, growing on high ridges of the Musgrove Ranges, between boulders in open mallee shrubland. Also found in Western Australia and Northern Territory.
Status:
Native. Rare in South Australia. Rare in the other states.
Plant description:
Multi-stemmed mallee to 4 m tall with longitudinally peeling, reddish-brown bark revealing a greenish to yellowish-brown bark beneath. Juvenile leaves heart-shaped, waxy, dull, blue-green. Adult leaves to 46 mm long and 35 mm wide, on a long stalk, extended hear-shaped, waxy, dull, blue-green. Flowers axillary in groups of 7. Buds to 10 mm long and 8 mm wide, waxy, bud-cap rounded equal to or slightly longer than the base. Flowers pale creamy yellow appearing after rain.
Fruit type:
Oboconicl fruit to 10 mm long and 16 mm wide, disc ascending, valves 4 or 5 above the rim.
Seed type:
Dark brown secteroid to ovoid seed to 2 mm long and 1.5 mm wide, with reticulate 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
BGA8500 (8.7 g)100+20-May-2014DJD2844
North Western
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 201496%7d7d 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)