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Dryandra borealis
 
Ruler

Distrbution Map
Family: Proteaceae
Distribution: Western Australia on sand plains north and south of Geraldton.
Common Name: No generally accepted common name.
Derivation of Name: Dryandra...after Jonas Dryander, a swedish botanist.
borealis..."of the north", referring to the fact that the species is the most northerly of the dryandras.
Conservation Status: Not considered to be at risk in the wild at the species level although one botanical variety is at risk.

General Description:

Dryandra is a large genus of 135 species in the Protea family. Their nearest relative is the genus Banksia but, unlike the banksias, Dryandra occurs naturally only in Western Australia (Banksia can be found in all states and one species one even extends its range to islands to Australia's north).

Dryandra borealis

Dryandra borealis has been in cultivation among enthusiasts for some time but it has only recently been formally named. There are two recognised subspecies; subsp.borealis occurs in the Kalbarri area about 400 km north of Perth while subsp.elatior occurs about 200 km further south in a restricted area near Three Springs. The former subspecies differs from subsp.elatior in being a smaller plant overall and having leaves which have a distinct twist. D.borealis subsp.elatior is regarded as being endangered

The typcal form is a small shrub to about 1 metre in both height and width. The leaves are around 90 mm long by 30 mm wide but deeply lobed almost to the mid-rib. As indicated above, a distinctive feature is the spiral twisting (between 1 and 3 times) along the length of the leaves. D.borealis subsp. elatior is a larger plant reaching 2.5 metres in height.

The flowers clusters of D.borealis are bright orange-yellow and around 30-35 mm in diameter. They are conspicously displayed either at the ends of stems or in the leaf axils and are seen in late winter through to late spring.

D.borealis is not well known in cultivation but is a very desirable plant which has proven itself to be hardier than many other Dryandras in sub-tropical areas. It has been flowered successfully in Sydney in a well drained sunny position.

Propagation from seed is relatively easy and cuttings may be successful but slow to strike.


Transfer of Dryandra to Banksia
A paper published in February 2007 (see below) has proposed that the genus Dryandra be subsumed into Banksia. The paper publishes new names in Banksia for all currently recognised Dryandra species. At this stage ASGAP is retaining Dryandra as a separate genus until it becomes clear whether the published change will be generally accepted by Australia herbaria.
Mast A R and Thiele K; The transfer of Dryandra R.Br. to Banksia L.f. (Proteaceae); Australian Systematic Botany, 26 February 2007


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Updated: Friday 9 November 2007.