Seeds of South Australia
Allocasuarina muelleriana ssp. notocolpica (Casuarinaceae)
Kangaroo Island Oak-bush
List of species for Allocasuarina
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Seed collecting:
January to December
Herbarium region:
Kangaroo Island
NRM region:
Kangaroo Island
IBRA region
Kangaroo Island (KAN01)Kanmantoo
 Least Concern   [endemic to KI; widespread]
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 Allocasuarina]
Name derivation:
Allocasuarina from the Greek 'allos' meaning other or different, indicating the relationship with the genus Casuarina (first used by Rumphius (1743) in allusion to the supposed resemblance of the "foliage" of Casuarina equisetifolia to the plumage of the Cassowary, which is from the Malay 'kesuari', latter being latinised as Casuarius). Muelleriana named after Baron Ferdinand von Muller (1825-1896), botanist, plant collector and Government Botanist of Victoria. Notocolpica from the Greek 'notos' meaning south and 'kolpos' meaning a gulf; referring to its occurrence south of Gulf S Vincent and Spencer Gulf.
Distribution:
Endemic to South Australia and found only on Kangaroo Island, growing in open woodland and shrubland on stony siliceous soils.
Status:
Native. Common but restricted to Kangaroo Island.
Plant description:
Dioecious or rarely monoecious shrub to 3 m high with smooth bark. Stem (looks like leaves) are ascending to 12 cm long with stem segments to 11 mm long and 1.1 mm diameter, usually angular, waxy, margins adjacent to furrows not raised, with 6 to 7 teeth (reduced leaves) to 0.6 mm long at segment junction. Male spikes resemble a necklace of beads, orange-brown. Female flowers singular, red. Cones on stout peduncle to 17 mm long and 4.5 mm diameter with cone body to 30 mm long and 18 mm diameter. This subspecies differ from the other two subspecies found in South Australia in that A. muelleriana ssp. muellerian have stem segments to 8 mm long and 0.8 mm diameter, cones with peduncles to 8 mm long and A. muelleria ssp. alticola which is endemic to the northern Flinders Ranges have stem segments to 7 mm long and 1 mm diameter, cones with peduncles to 3 mm and 2.5 mm diameter. Flowers throughout the year.
Fruit type:
Large woody cylindrical cone on stout peduncle with numerous valves.
Seed type:
Dark brown to black, smooth and semi-flat seeds to 5 mm long with a long papery wing at one end.
Embryo type:
Investing.
Seed collecting:
Cones can be collected anytime as mature cones remain on the female plant. Collect cones that have closed valves from the lower part of the stem as these are more mature.
Seed cleaning:
Place cones in a tray and leave to dry for 2-3 weeks. This will allow the valves to dry and open releasing the seeds. Place the dried cones in a bucket and shake gently to dislodge the seeds. Use a sieve to separate seeds from 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:
From one collection, the seed viability was high, at 85%.
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
BGA 
MSB
21360
21360
1216-Oct-2003PJA 37
Kangaroo Island
1-Sep-200485%+5°C, -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
March 2010100%17d21d Stored at -18°C (5years)
1% w/v agar
Incubated under winter conditions
August 200693%20d41d Stored at -18°C (1year)
Wet filter paper placed over wettex sponge. Irrigated with RO water
Incubated under winter conditions
July 200485%15d26d Seed sterilised with 20% Hydrogen Peroxide with 2 drops of Tween (10min). Rinsed in sterile water.
0.8% w/v agar plates
14/10 dark/light  /  10°C/20°C
August 200673%27d48d Stored at -18°C (1year)
Wet filter paper placed over wettex sponge. Irrigated with RO water
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)