Seeds of South Australia
Commersonia craurophylla (Sterculiaceae)
Brittle Leaved Rulingia
List of species for Commersonia
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Seed collecting:
October to December
Herbarium region:
Eyre Peninsula
NRM region:
Eyre Peninsula
IBRA regions
Eyre Hills (EYB03)Eyre Yorke Block
 Vulnerable   (IUCN: VU D1+2)
Eyre Mallee (EYB05) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Gawler Volcanics (GAW02)Gawler
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [no 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 Commersonia]
Name derivation:
Commersonia named after Philibert Commerson (1727-1773), a French naturalist best known for accompanying Louis Antoine de Bougainville on his voyage of circumnavigation in 1766–1769. Craurophylla possible means brittle leaf.
Found scattered on the upper Eyre Peninsula growing on sandy loam over limestone in mallee. Also found in Western Australia.
Native. Very rare in South Australia but can be more common post fire. Common in Western Australia.
Plant description:
Shrubs to 2 m high and often broader than high, with branches covered in dense stellate hairs. Leaves linear-oblong, rigid, with a deeply impressed midrib and secondary veins, with recurved or revolute margins; densely hairy on both surfaces, to 40 mm long and 5 mm wide. Inflorescences in dense short panicles with 20 white flowers. Flowering between August and October.
Fruit type:
Hairy brown globular capsule to 5 mm diameter, splitting when mature and containing numerous seeds.
Seed type:
Small brown ovoid seed to 1.8 mm long and 1 mm wide, with fine wrinkled surface.
Embryo type:
Seed collecting:
Capsules can be collected prior to splitting, as long as the seeds inside are hard and brown.
Seed cleaning:
Place the capsules in a tray and leave to dry for at least a week. Rub the dried capsules by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Store the seeds with a dessicant 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 85%.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
BGA2790 (2.179 g)116-Oct-2007MJT56
Eyre Peninsula
19-Sep-200885%+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.