Hakea nodosa       4880

It is a spreading, upright or rounded shrub, 2m high, lignotuberous or not. The branchlets are ribbed, soon or tardily glabrescent.

The leaves are terete to flattened, flexible, 0.8-5cm long, 0.7-2.5mm wide, glabrous, sometimes grooved below. The mucro is circa 0.2-0.9mm long.

The inflorescence is with 2-11 flowers. The rachis is simple, 0.5-1mm long, rarely up to 6 rachises developing on previous year's rachis, densely pubescent with appressed brown and/or white raised hairs. The flowers are cream-white to deep yellow. The pedicels are 1.5-3.3mm long, white-pubescent. The perianth is 1.3-2.2mm long, glabrous. The pistil is 3-4.5mm long. The gland is curved-rectangular.

The fruit is dimorphic, remaining closed if woody, opening if less woody, broadly ovate, 1.3-3.5cm long, 0.9-3cm wide, densely coarsely warty or almost smooth. The beak is short, oblique and broad, or sometimes narrow, decurrent down red-brown wood zone side only. The horns are absent. The seed is marginal, obliquely elliptic, 12-23mm long, 5.5-11mm wide. The wing is decurrent broadly 2/3 to whole way down on one side only, dark-grey to grey-yellow.

The Genus: Hakea Section: Hakea Serie: Nodosa having the following characters: Shrubs or more rarely, small trees, without corky bark. Leaves simple, terete (sometimes flattened in H. nodosa), not petiolate, not stem-clasping, sometimes grooved below; venation obscure. Inflorescence an axillary umbel, rarely resprouting in subsequent years, developing within involucre; bracts not persisting at base of inflorescence; rachis 0.6–2.5 mm long. Flowers 1–11 per umbel; pedicel pubescent. Perianth curved in bud, splitting to base into 4 distinct tepals, pubescent or glabrous. Pistil 3–4.5 mm long; pollen presenter an oblique disc; gland minute, U-shaped or rectangular. Fruit usually solitary, erect, retained on plant, woody (except sometimes in H. nodosa), tuberculate, beaked, horned or not, dehiscing fully down one side, mostly down other. Seed occupying part of valve; wing 1/2 way to ±fully down one side (red-brown wood) of seed body, not at all on other; seed body flanged on pale wood side or on both sides proximal to the wing.

A group of three species, found in S.A., N.S.W., Vic. and Tas.

Although with limited ornamental qualities, this species has value for its hardiness and adaptability to a wide range of soil types and conditions in temperate regions. A variant with greyish green foliage is fairly ornamental and a dwarf variant is popular with some enthusiasts. Plants grow fast, respond well to regular pruning or clipping and can be used for hedging.

References
- Encyclopedia of Australian Plants, Elliot W. Rodger & Jones David L. 2012 Vol. 5 pag. 219. ISBN
- Flora of Australia. profiles.ala.org.au/opus/foa/profile Vol. 17B pag. 66-67. Hakea nodosa
- Hakeas, a field and garden guide, Ivan Holliday. 2005 pag. 144-145. ISBN
- Native trees and shrubs of South-Eastern Australia, Leon Costermans. 1996 pag. 156. ISBN
- Novelties and Taxonomic Notes Relating to Hakea Sect. Hakea (Proteaceae), Mainly of Eastern Australia, W.R. Barker. Journal of the Adelaide Botanic Gardens 1996 Vol. 17 pag. 177-209. JStor

- Encyclopedia of Australian Plants, Elliot W. Rodger & Jones David L. 2012 pag. 186-189. ISBN
- Australian Proteaceae: new taxa and notes, McGillivray, Donald. Telopea 1975 Vol. 1(1) pag. 19-32. DOI
- Flora of Australia. profiles.ala.org.au/opus/foa/profile Vol. 17B pag. 1-35. Hakea
- New species, new combinations and other name changes in Hakea (Proteaceae), Barker, RM. Journal of the Adelaide Botanic Garden 1990 pag. 95-110. JStor
- Novelties and Taxonomic Notes Relating to Hakea Sect. Hakea (Proteaceae), Mainly of Eastern Australia, W.R. Barker. Journal of the Adelaide Botanic Gardens 1996 Vol. 17 pag. 177-209. JStor
- Taxonomic notes on Hakea Schrader (Proteaceae), mainly relating to South Australia, Barker, WR. Journal of the Adelaide Botanic Garden 1985 pag. 233-247. JStor
- The Hakea pedunculata group of species (Proteaceae) and a new subspecies of Hakea stenophylla from Western Australia, Barker, R. M. Nuytsia: journal of the Western Australian Herbarium 1998 Vol. 12 pag. 1-8. Address
- Towards a revision of the Hakea epiglottis Labill.(Proteaceae) complex of Tasmania, Barker, RM. 1991 Vol. 124(2) pag. 79-84. Address
- The use of Trees and Shrubs in the Dry Country of Australia, Norman Hall. 1972 pag. 384-385. ISBN

Biological type: shrub
Frost resistance: 18ºF
Leaf color: dark green
Flower color: yellow
No transplantation: Yes

Specifications for the Mediterranean basin
Adult size (h x w): 13,1ft x 9,8ft
Sun exposure: part sun (Sun hours: >3h <6h
Foliage: evergreen
Growth: fast
Flowering time from November until February
Ripe fruits from June until November

Specific information for our garden
Planting substrate: 30%Compost+30%Coco+40%Sand
Plant watering: 3x a week pH 6.5
Logical sequence of containers for: Heathers; forestry plate, forestry pot 3L, Airpot 12L, Airpot 50L
Propagation is done by cuttings
Units in the garden: 1x

Ecology in its country of origin
Rainfall: 600-900mm
Clay soil: a little
Sandy soil: much

SPRING Keep in refrigerator at 39°F for 8 weeks in dry condition. Sow the seeds at 2mm depth in the Well Drained Seed Sowing Mix between 64-72°F. During germination keep the substrate moist and in daylight. The seeds germinate in 3-6 weeks.
The average seed weight is 71,5 per gram (0,01398g).

Cuttings instructions
Take the cuttings in early fall. Soak them in a hormonal preparation for cuttings before planting them in a substrate composed of 50% perlite and 50% heather earth. Keep them sufficiently moist at a temperature of 20°C in sealed freezer bags. Keep the light on for 16 hours a day.