''Conospermum triplinervium'', commonly known as the tree smokebush or elk smokebush, is a tree or shrub endemic to

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

. The tree or shrub typically grows to a height of . It blooms between August and January producing cream-white flowers. It has an upright habit and produces about 50 flowering stems per plant which produce white hairy flowers mostly during summer between August and November. It has a number of forms with broad leaves and several habits from weeping to strong upright stems. The species was first formally described by the botanist Robert Brown in 1830 as part of the work ''Proteaceas Novas. Supplementum primum prodromi florae Novae Hollandiae''. There are two synonyms; ''Conospermum laniflorum'' and ''Conospermum triplinervium'' var. ''triplinervium''. It is found on sand plains and in winter wet depressions along the coast in the

Mid West The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of the United States. I ...

, Wheatbelt, Peel and Great Southern regions of Western Australia where it grows in sandy soils over

laterite Laterite is both a soil and a rock type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by ...

. The plant is suitable for the production of cut flowers with a reasonably high yield. It is also suitable as animal fodder, the 1889 book 'The Useful Native Plants of Australia’ records that common names included "Native Orange" and "Orange Thorn" and that " Baron Mueller suggests that these plants be tried on the worst desert country, as all kinds of pasture animals browse with avidity on the long, tender, and downy flower-stalks and spikes, without touching the foliage, thus not destroying the plant by close cropping."

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* {{Taxonbar, from=Q15574549 triplinervium Endemic flora of Western Australia Eudicots of Western Australia Plants described in 1830 Taxa named by Robert Brown (botanist, born 1773)