Plants of
South Australia
Eucalyptus angulosa
Southern Ridge-fruited Mallee,
Coast Ridge-fruited Mallee
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Critically endangered
Data deficient
Coober Pedy
Mount Gambier
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Botanical art

Kath Alcock paintings: 4

Prior names

Eucalyptus incrassata var. angulosa

Common names

Southern Ridge-fruited Mallee

Coast Ridge-fruited Mallee


Eucalyptus from the Greek 'eu' meaning well and 'calyptos' meaning covered; alluding to the cap or lid which covers the stamens in the bud. Angulosa from the Latin 'angulosus' meaning strongly-angled; referring to the branchlets, buds and fruits with angled sides.

Distribution and status

Found on southern Eyre Peninsula in South Australia, growing on white sandy soils over limestone in dense mallee shrubland. Also found in Western Australia. Native. Uncommon in South Australia. Common in Western Australia.
Herbarium region: Eyre Peninsula
AVH map: SA distribution map (external link)

Plant description

Multi-stemmed, usually dense-crowned mallee to 6 m high with smooth, grey or grey-brown bark, shedding in strips to reveal a paler layer, with rough bark at the base. Juvenile leaves ovate to lanceolate, dull and blue-green, soon becoming glossy and green. Adult leaves to 140 mm long and 40 mm wide, alternate, on stalk to 20 mm long; lanceolate, glossy, thick, green. Flowers in groups of 3 in axils. Buds to 25 mm long and 12 mm wide, urn-shaped, distinctly ribbed; bud-cap cone-shaped ,equal in length to the base. Flowers cream appearing in spring. Fruits are thick-walled, cup-shaped to cylindrical fruit to 25 mm long and 25 mm wide; distinctly ribbed with sunken, disc &,3 or 4 valves below the rim. Seeds are dark brown to black, irregularly pyramidal seed to 4 mm long and 3 mm wide, with angled sides and covered in fine wrinkles. Seed embryo type is folded.

Seed collection and propagation

Collect seeds between January and December. Collect mature fruits that are dark and hard (difficult to break with a finger nail), with the valves un-open, any time of year. 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. Seeds are non-dormant, viable seed should germinate readily.

Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA10,700 (18.5 g)3626-Aug-2014DJD3004
Eyre Peninsula
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: