Seeds of South Australia
Eucalyptus canescens ssp. canescens (Myrtaceae)
Oak Valley Mallee
List of species for Eucalyptus
Display more images
Click on an image to enlarge it
Seed collecting:
January to December
Herbarium region:
North Western
NRM region:
Alinytjara Wilurara
IBRA regions
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: RA d(ii))
Yellabinna (GVD06) 
 Rare   (IUCN: RA d(ii))
Carlisle (NUL01)Nullarbor
 Rare   (IUCN: RA d(ii))
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. Canescens from the Latin 'canescens' meaning becoming grey; referring to the greyish leaves and waxy branchlets, buds and fruits giving the plant a greyish appearance. 
Distribution:
Found in the far western part of South Australia, restricted to the southern Great Victoria Desert, growing on sand dunes and sand plains in deep red sand. Also found in Western Australia.
Status:
Native. Rare in South Australia. Rare in Western Australia.
Plant description:
Multi-stemmed mallee to 6 m tall with rough stringy-fibrous to flaky-fibrous, yellow-brown to grey bark on lower stems and smooth bark above. Juvenile leaves opposite for 1-3 pairs, ovate. Adult leaves to 115 mm long and 55 mm wide, elliptical to ovate to broad-lanceolate, proinose, dull, blue-grey. Flowers axillary, umbel with 7 flowers,  held erect. Buds to 16 mm long and 12 mm wide, pruinose, bud-cap hemisperical, ribbed, equal in width or wider than the bud-base. Flowers creamy-white. This subspecies is distinguished from E. canescens ssp. beadellii by its strongly waxy adult leaves, branchlets, buds and fruits.
Fruit type:
Cupular to shortly cylindrical fruit, smooth to strongly ribbed, pruinose, to 16 mm long and 14 mm, disc level to descending, valves 4 or 5, at or just below rim level.
Seed type:
Brown pyramidal-shaped seed to 4 mm long and 2 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 germination:
Seeds are non-dormant, viable seed should germinate readily.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
July 2015100%7d7d None
1% water agar
12 hrs light / 12 hrs 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)