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 brittled leaf.
Distribution:
Found scattered on the upper Eyre Peninsula, growing on sandy loam over limestone in mallee. Also found in Western Australia.
Status:
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 dence short peduncles with 20 white flowers. Flowering between August and October.
Fruit type:
Hairy brown globular capsule to 5 mm diameter, splitting when matured and contain numerous seeds.
Seed type:
Small brown ovoid seed to 1.8 mm long and 1 mm wide, with fine wrinkled surface.
Embryo type:
Spathulate.
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)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
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.