Seeds of South Australia
Eucalyptus camaldulensis ssp. arida (Myrtaceae)
Inland River Red Gum
List of species for Eucalyptus
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Seed collecting:
December to April
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
Roxby (GAW07)Gawler
 Rare   (IUCN: RA d(i,ii))   [(no records) E camaldulensis ssp arida; restricted]
Kintore (GVD04)Great Victoria Desert
 Rare   (IUCN: RA d(i,ii))   [(NC records) E camaldulensis ssp arida]
Breakaways (STP01)Stony Plains
 Near Threatened   [E camaldulensis ssp arida]
Oodnadatta (STP02) 
 Rare   (IUCN: RA d(i,ii))   [(no records) E camaldulensis ssp arida; limited habitat]
Peake-Dennison Inlier (STP04) 
 Data Deficient   [(no records) E camaldulensis ssp arida]
Macumba (STP05) 
 Rare   (IUCN: RA d(i,ii))   [(no records) E camaldulensis ssp arida; limited habitat]
Witjira (STP06) 
 Rare   (IUCN: RA d(ii))   [(NC records) E camaldulensis ssp arida; restricted to waterholes & drainage lines]
Sturt Stony Desert (CHC02)Channel Country
 Rare   (IUCN: RA d(ii))   [(no records) E camaldulensis ssp arida]
Coongie (CHC06) 
 Rare   (IUCN: RA d(ii))   [(no records) E camaldulensis ssp arida]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern   [(NC records) E camaldulensis ssp arida]
Watarru (CER02) 
 Rare   (IUCN: RA d(i))   [(NC records) E camaldulensis ssp arida]
Tieyon (FIN03)Finke
 Least Concern   [(no records) E camaldulensis ssp arida]
Pedirka (FIN04) 
 Data Deficient   [(lack of records) E camaldulensis ssp arida]
IBRA regions
Roxby (GAW07)GawlerRare
  (IUCN: RA d(i,ii))   [(no records) E camaldulensis ssp arida; restricted]
Kintore (GVD04)Great Victoria DesertRare
  (IUCN: RA d(i,ii))   [(NC records) E camaldulensis ssp arida]
5 of 7 subregionsStony PlainsNear Threatened
, Rare
, Data Deficient
2 of 4 subregionsChannel CountryRare
2 of 3 subregionsCentral RangesLeast Concern
, Rare
2 of 2 subregionsFinkeLeast Concern
, Data Deficient
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. Arida from the Latin 'aridus' meaning dry or arid; referring to the distribution of the subspecies in arid interior of Australia.
Found in the northern part of South Australia, growing along creeks and on floodplains. Also found in Western Australia, Northern Territory, Queensland and New South Wales.
Native. Common in South Australia. Common in the other states.
Plant description:
Single stem tree to 28 m tall with smooth, variegated bark throughout. Juvenile leaves opposite initially, ovate to broad-lanceolate, pruinose, dull, blue-green to bluish. Adult leaves lanceolate to broad-lanceolate, to 230 mm long and 40 mm wide, dull, blue-green to bluish. Inflorescence axillary cluster with 7 creamy-white flowers. This subspecies differ from the other two subspecies found in South Australia by having the broad lanceolate to ovate juvenile leaves, dull green-green adult leaves, bud-cap that are rounded and not beaked and erect flower stamens. Flowering between October and February.
Fruit type:
Woody, hemispherical to ovoid fruit to 7 mm long and 9 mm wide, on individual slender stalk with ascending disk, valves 3-5 exserted above the rim.
Seed type:
Orange-brown, irregularly shaped seed to 1 mm long and 0.7 mm wide.
Embryo type:
Seed collecting:
One of the few eucalypt species that release their seed. 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 viability:
From one collection, the seed viability was high, at 95%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily. Germination 100% on 1% w/v agar, 8/16 dark/light, 20°C. See
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
51-Dec-2003PJA 49
North Western
1-Sep-200495%+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.