Plants of
South Australia
Gossypium sturtianum var. sturtianum
Malvaceae
Sturts Desert-rose
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
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Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Etymology

Gossypium from the Latin 'gossypion', named used by Pliny the Elder to describe the cotton tree, which is derived from the Arabic 'goz' meaning soft such as cotton, referring to the fluffy white seed covering, common to the genus. Sturtianum named after Captain Charles Napier Sturt (1795-1869), a British explorer of Australia, and collector of the type specimen.

Distribution and status

Found in two disjunct areas in South Australia, in the far north-western corner and around the Flinders Ranges, growing on rocky or gravelly ranges, hills or rises and along watercourses and run-on areas. Also found in Western Australia, Northern Territory, Queensland and New South Wales. Native. Common in South Australia. Uncommon in Western Australia. Common in the other States.
Herbarium regions: North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty
NRM regions: Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
AVH map: SA distribution map (external link)

Plant description

Erect woody shrub to 3 m high, grabrous. Leaves glabrous, alternate, ovate or rounded to 6 cm long, folded along the main vein, dark green and with a long stalk to 3 cm. Leaves are strongly scented when crushed. Inflorescence solitary large mauve to lilac flower with a dark red centre. Flowers throughout the year. Fruits are brown with black-dotted, papery ovoid capsule to 16 mm long, with numerous seeds. Seeds are segmented brown seed to 6 mm long and 3 mm wide, covered in dense whitish green to brown hairs. Seed embryo type is folded.

Seed collection and propagation

Collect seeds between January and December. Collect capsules that are drying off and starting to turn brown. The seed inside should be brown and hard. Place the capsules into a tray and leave to dry for a week. Then rub the capsules by hand to dislodge the seeds. Use a sieve to separate the unwanted material. 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. This species has physical dormancy that needs to be overcome for the seed to germinate (e.g. nicking or softening the seed coat).

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
1,300 (15.91 g)
1,300 (15.91 g)
4024-Nov-2005DJD234
Flinders Ranges
7-Aug-200695%-18°C
BGA5,000 (65.88 g)25+8-Dec-2011KHB631
Eastern
1-Nov-201290%-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.