Seeds of South Australia
Hakea nodosa (Proteaceae)
Yellow Hakea
List of species for Hakea
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Seed collecting:
January to December
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Rare   (IUCN: RA d(ii))   [freshwater swamp spp]
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [freshwater swamp spp]
Glenelg Plain (NCP02) 
 Rare   (IUCN: RA d(ii))   [freshwater swamp spp]
Lucindale (NCP03) 
 Near Threatened   (Probable Decline)   [stronghold]
Tintinara (NCP04) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [localised salinity a threat]
Lowan Mallee (MDD04)Murray Darling Depression
 Rare   (IUCN: RA d(i,ii))   [edge of range; could be H Mitchellii]
Wimmera (MDD05) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
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 Hakea]
Name derivation:
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:
Found in the South-east in South Australia, growing in closed heath and in swampy areas. Also found in Victoria and Tasmania.
Status:
Native. Uncommon in South Australia. Common in the other states.
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.
Fruit type:
Greyish-brown woody ovoid fruit to 35 mm long and 30 mm wide, with a warty surface and short beak. Fruit split into two to reveal two seeds.
Seed type:
Black ovoid seed to 8 mm long and 5 mm wide (excluding the wing that extend narrowly down both sides of seed). 
Embryo type:
Investing.
Seed collecting:
Collect mature woody fruit that are greyish-brown and not split. These will contain seeds.
Seed cleaning:
Place the woody fruit in a tray and leave to dry until it split 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.
Seed viability:
From one collection, the seed viability was high, at 95%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily without pre-treatment.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
1580 (27.44 g)
1500 (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.