Diuris eburnea

Diuris eburnea is a tuberous, perennial herb with between four and six linear leaves {{convert|120-200|mm|in|sigfig=1|abbr=on}} long, {{convert|1-3|mm|in|sigfig=1|abbr=on}} wide and folded lengthwise. Up to eight pale yellow to cream-coloured flowers with reddish markings, {{convert|20-30|mm|in|sigfig=1|abbr=on}} long and {{convert|12-15|mm|in|sigfig=1|abbr=on}} wide are borne on a flowering stem {{convert|200-450|mm|in|sigfig=1|abbr=on}} tall. The dorsal sepal is egg-shaped, {{convert|9-13|mm|in|sigfig=1|abbr=on}} long, {{convert|4-6.5|mm|in|sigfig=1|abbr=on}} wide and curves upwards. The lateral sepals are oblong, {{convert|9-14|mm|in|sigfig=1|abbr=on}} long, {{convert|2-3|mm|in|sigfig=1|abbr=on}} wide and turned downwards, parallel to or crossed over each other. The petals are more or less erect and spread apart from each other, egg-shaped to elliptic, {{convert|7-11|mm|in|sigfig=1|abbr=on}} long and {{convert|6-8|mm|in|sigfig=1|abbr=on}} wide on a purplish brown stalk {{convert|2.5-4|mm|in|sigfig=1|abbr=on}} long. The labellum is {{convert|9-12|mm|in|sigfig=1|abbr=on}} long, turns slightly downwards and has three lobes. The centre lobe is broadly egg-shaped to wedge-shaped, {{convert|8-11|mm|in|sigfig=1|abbr=on}} long and {{convert|7-10|mm|in|sigfig=1|abbr=on}} wide and the side lobes are egg-shaped with the narrower end towards the base, {{convert|4.5-6|mm|in|sigfig=2|abbr=on}} long and about {{convert|3|mm|in|sigfig=1|abbr=on}} wide. There are two callus ridges {{convert|4.5|mm|in|sigfig=1|abbr=on}} long near the mid-line of the labellum. Flowering occurs in October and November.{{cite journal|last1=Jones|first1=David L.|title=Miscellaneous new species of Australian Orchidaceae|journal=Australian Orchid Research|date=2006|volume=5|page =78}}{{cite book|last1=Hoffman|first1=Noel|last2=Brown|first2=Andrew|title=Orchids of South-West Australia.|date=2011|publisher=Noel Hoffman|location=Gooseberry Hill|isbn=9780646562322|page=477|edition=3rd}}

Diuris eburnea was first formally described in 2006 by David Jones from a specimen collected north of Eneabba and the description was published in Australian Orchid Research.{{cite web|title=Duiris eburnea|url= https://id.biodiversity.org.au/instance/apni/616353|publisher=APNI|accessdate=19 March 2018}} The specific epithet (eburnea) is a Latin word meaning "of ivory",{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page =294}} referring to the colour of the flowers of this orchid.

Arrowsmith bee orchid grows in winter-wet areas on the banks of the Arrowsmith River in the Geraldton Sandplains biogeographic region.{{FloraBase|name=Diuris eburnea|id=33158}}

Diuris eburnea is classified as "Priority One" by the Western Australian Government Department of Parks and Wildlife, meaning that it is known from only one or a few locations which are potentially at risk.{{cite web|title=Conservation codes for Western Australian Flora and Fauna|url=https://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/Conservation%20code%20definitions.pdf|publisher=Government of Western Australia Department of Parks and Wildlife|accessdate=27 July 2019}}

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eburnea

Category:Endemic orchids of Australia

Category:Orchids of Western Australia

Category:Plants described in 2006

Category:Taxa named by David L. Jones (botanist)