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

Kath Alcock paintings: 7.

Etymology

Hakea, named after Baron Christian Ludwig von Hake (1745-1818), a German horticulturalist and patron of botany. Nodosa, from the Latin 'nodosus' meaning knobby or knotted, referring to the surface of the fruit.

Distribution and status

Found in the South-east in South Australia growing in closed heath and in swampy areas. Also found in Victoria and Tasmania. Native. Uncommon in South Australia. Common in the other States.
Herbarium region: South Eastern
NRM region: South East
AVH map: SA distribution map (external link)

Plant description

Spreading, upright or rounded shrub 2 m high. Leaves terete to flattened, to 50 mm long and 2.5 mm wide, glabrous; sometimes grooved below. Inflorescence in clusters with 2-11 cream-white to deep yellow flowers. Flowering between May and August. Fruits are greyish-brown woody ovoid fruit to 35 mm long and 30 mm wide, with a warty surface and short beak. Fruit splits into two, to reveal two seeds. Seeds are black ovoid seed to 8 mm long and 5 mm wide (excluding 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 greyish-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. From one collection, the seed viability was high, at 95%. 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
BGA 
MSB
1,580 (27.44 g)
1,500 (25.97 g)
31-Jan-2006HPV2891
South Eastern
8-Aug-200695%-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.