Plants of
South Australia
Hakea rugosa
Proteaceae
Wrinkled Hakea
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
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Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock painting: 1.

Etymology

Hakea named after Baron Christian Ludwig von Hake (1745-1818), a German horticulturalist and patron of botany. Rugosa from the Latin 'rugosus' meaning somewhat wrinkled, referring to the surface of the fruit.

Distribution and status

Found in southern South Australia from the southern Flinders Ranges to the lower South-east growing in mallee scrub or coastal heath on sand or loam. Also found in Victoria. Native. Common in South Australia. Common in Victoria.
Herbarium regions: Flinders Ranges, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
AVH map: SA distribution map (external link)

Plant description

Low spreading intricate bush or rounded compact shrub to 2.5 m high with white hairs on branchlets and young leaves. Leaves rigid, terete, to 60 mm long and 1.3 mm wide; pungent tip, glaucous. Inflorescence axillary clusters with 6–10 cream-white, scented flowers. Flowering between August and October. Fruits are whitish-brown woody S-shaped fruit to 22 mm long and 16 mm wide, with a coarse wrinkled surface and a beak at one end. Fruit splits into two to reveal two seeds. Seeds are brown to black ovoid seed to 7 mm long and 4 mm wide (13 mm long and 8 mm wide including the wing that extend narrowly down both sides of seed). Seed embryo type is investing.

Seed collection and propagation

Collect seeds between January and December. Collect mature woody fruit that are hard, brown and not split. These will contain seeds. Place the woody fruit in a tray and leave to dry until it splits open. Fruits can be placed in the oven at low temperatures to achieve the same result. Place the dried fruit in a bucket and shake to dislodge the seeds from the valves. Separate the seeds from the fruit and 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 without pre-treatment.

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
 
MSB

1,300 (10.1 g)
50+14-Feb-2006KHB54
South Eastern
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:
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