Seeds of South Australia
Eucalyptus albens (Myrtaceae)
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List of species for Eucalyptus
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Seed collecting:
January to December
Herbarium regions:
Flinders Ranges, Northern Lofty
NRM region:
Northern and Yorke
IBRA region
Southern Flinders (FLB04)Flinders Lofty Block
 Vulnerable   (IUCN: VU C1+2a(i))   (Probable Decline)   [In Mt Remarkable (Blue Gum Flat); hybridises with E microcarpa; endemic to SF in SA. (in eastern states) Rainfall decline a threat]
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. Albens from the Latin 'albens' meaning whitened; referring to either the lighter, bleached patches of bark or the waxy branchlets.
Distribution:
Found in the southern Flinders Ranges, growing in undulating to hilly terrain on loam to clay soils.
Status:
Native. Rare in South Australia. Common in the other states.
Plant description:
Single-stemmed trees to 22 m or more high with rough, subfibrous, light grey bark below and smooth and greyish above. Juvenile leaves opposite to alternate, petiolate, broadly lanceolate or ovate. Adult leaves on petioles to 25 mm long, broad-lanceolate, dull, bluish-green, usually waxy, to 15 cm long and 3 cm wide. Flowers in panicles or in umbels of 3-7 in the axils of the leaves. Buds on often poorly defined pedicels to 4 mm long, ellipsoid to fusiform, waxy, bluish-green, smooth, to 15 mm long and 6 mm eide, bud-cap elongate-conical, equal to or exceeding the bud-base. Flowers white. Flowering mainly between May and July.
Fruit type:
Cylindrical-ellipsoid fruit, with a narrow rim and broad descending disk, to 12 mm long and 10 mm,  valves small, deeply enclosed. 
Seed type:
Brown ovoid seed to 2 mm long and 1 mm wide, with fine wrinkles.
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
BGA 
MSB
7350 (7.39 g)
7350 (7.39 g)
25+9-Oct-2006KHB63
Northern Lofty
1-Aug-2007100%-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
July 201583%8d8d None
1% water agar
12 hr light/12 hr dark  /  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)