Seeds of South Australia
Eucalyptus cneorifolia (Myrtaceae)
Kangaroo Island Narrow-leaf Mallee
List of species for Eucalyptus
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Seed collecting:
January to December
Herbarium regions:
Southern Lofty, Kangaroo Island
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island
IBRA region
Kangaroo Island (KAN01)Kanmantoo
 Least Concern   (Probable Decline)   [restricted to eastern KI; slow decline due to clearance; roadworks a threat]
Fleurieu (KAN02) 
 Vulnerable   (IUCN: VU D2)   [mostly not protected here; bridal creeper an issue in many areas; low regeneration]
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. Cneorifolia from the genus Cneorum and the Latin 'folium' meaning a leaf; referring to the likeness of the species leaves to the unrelated plant Cneorum tricoccum.
Distribution:
Endemic to South Australia and found on the eastern half of Kangaroo Island and the lower Fleurieu Peninsula, growing on well-drained soils over laterite or limestone in dense mallee shrubland.
Status:
Native. Uncommon in South Australia.
Plant description:
Multi-stemmed or single-stemmed trees to 10 m high with somewhat fibrous, greyish-brown to dark-grey, longitudinally fissured lower bark and smooth greyish bark above. Juvenile leaves opposite, linear-lanceolate or narrowly elliptic, glossy. Adult leaves to 100 mm long and 10 mm wide, alternate, linear-lanceolate or linear-oblong, suberect, glossy, olive-green, dull and grey-green when dried, veins indistinct. Flowers in umbels of 4-14 in the axils of the leaves. Buds to 10 mm long and 5 mm wide,  usually more or less ellipsoid, bud-cap conical or hemispherical-conical, at least as long as the bud-base. Flowers white. Flowering between December and April.
Fruit type:
Hemispherical or hemispherical-globose fruit to 7 mm long and 8 mm wide, disk wide, flat or slightly raised, valves 3 or 4, needle-like, slightly exserted but soon broken off.
Seed type:
Brown ovoid seed to 2 mm long and 1 mm wide, with a slight 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 high, at 95%.
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
7619
7619
~1016-Oct-2003PJA 38
Kangaroo Island
1-Sep-2004100%+5°C, -18°C
BGA1700 (1.04 g)510-Mar-2010TST924
Southern Lofty
Jun-201095%-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 201093%7d17d Stored at -18°C (5 years)
1% w/v agar plates
Incubated under spring/autumn conditions
June 200485%15d38d Seed sterilised with 20% Hydrogen Peroxide with 2 drops of Tween (10min). Rinsed in sterile water.
0.8% w/v agar plates
16/8 dark/light  /  20°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)