Seeds of South Australia
Eucalyptus camaldulensis ssp. minima (Myrtaceae)
Finders Ranges River Red Gum
List of species for Eucalyptus
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Seed collecting:
December to March
Herbarium regions:
Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty
NRM regions:
Eyre Peninsula, Northern and Yorke, South Australian Arid Lands
IBRA regions
Northern Flinders (FLB05)Flinders Lofty Block
 Near Threatened   (Probable Decline)   [ssp restricted to Flinders; probably declining; climate sensitive]
Murnpeowie (STP03)Stony Plains
 Rare   (IUCN: RA d(ii))   [NC records; restricted]
Baltana (STP07) 
 Data Deficient   [need more records]
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' well and 'calyptos' covered; alluding to the cap or lid which covers the stamens in the bud. Camadulensis named after an abandoned monastery in the district of Camalduli in Italy where a tree was grown from seeds collected from south-eastern Australia. Frederick Dehnhardt, Chief Gardener at the Botanic Gardens in Naples used material from this tree to describe the species in 1832. The exact collection location of the seeds is unknown. Minima from the Latin 'minimus' meaning small; referring to the smaller size of the buds and fruits in comparison to the other subspecies of E. camaldulensis.
Distribution:
Endemic to South Australia and found in the Flinders Ranges and the Olary Spur, growing along creeklines and associated flood-out plains, with an isolated population in Bascombe Well Conservation Park on Eyre Peninsula growing in shallow depression on sheet limestone.
Status:
Native. Common in South Australia.
Plant description:
Single-stem tree to 45 m tall with smooth, pinkish-red to creamy bark throughout and some thick, plate-like bark at the base. Juvenile leaves opposite initially, ovate to broad-lanceolate, pruinose, blue-green to bluish. Adult leaves lanceolate to falcate, to 130 mm long and 20 mm wide, blue-green to bluish. Inflorescence axillary cluster with 7 creamy-white flowers. Bud smooth, to 7 mm long and 7 mm wide, bud-cap conical with a long beak equal to or longer than the base. This subspecies differ from the other two subspecies found in South Australia by having relatively smaller buds with conical beaked cap and smaller fruits. Flowering between October and December.
Fruit type:
Woody, hemispherical to ovoid fruit to 7 mm long and 6 mm wide, on individual stalk with ascending disk, valves 3-4 exserted above the rim.
Seed type:
Yelow-brown irregularly shaped seed.
Embryo type:
Folded.
Seed collecting:
One of the few eucalypt species that release their seeds. As a result monitoring of mature fruits is necessary. Collect mature fruits that are dark and hard (difficult to break with a finger nail), with the valves un-open.
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
March 2010100%7d7d Stored at -18°C (5 years)
1% w/v agar plates
Incubated under spring/autumn conditions
October 2006100%6d14d Stored at -18°C (1year).
Wet filter paper placed over wettex sponge. Irrigated with RO water
Incubated under winter conditions
October 200694%6d6d Stored at -18°C (1year).
Wet filter paper placed over wettex sponge. Irrigated with RO water
Incubated under spring/autumn conditions
June 200494%10d15d 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)