Diuris punctata

Diuris punctata is a tuberous, perennial herb with two linear leaves {{convert|150-300|mm|in|sigfig=1|abbr=on}} long, {{convert|3-4|mm|in|sigfig=1|abbr=on}} wide and folded lengthwise. Up to ten flowers {{convert|50-60|mm|in|sigfig=2|abbr=on}} wide are borne on a flowering stem {{convert|300-600|mm|in|sigfig=1|abbr=on}} tall. The flowers are purple or mauve, often with darker, sometimes yellow marks. The dorsal sepal is more or less erect, elliptic to egg-shaped, {{convert|10-18|mm|in|sigfig=1|abbr=on}} long and {{convert|8-14|mm|in|sigfig=1|abbr=on}} wide. The lateral sepals are greenish-brown, linear to lance-shaped, {{convert|30-50|mm|in|sigfig=1|abbr=on}} long, {{convert|2-4|mm|in|sigfig=1|abbr=on}} wide and turned downwards. The petals are erect with an egg-shaped blade {{convert|7-17|mm|in|sigfig=1|abbr=on}} long and {{convert|7-15|mm|in|sigfig=1|abbr=on}} wide on a dark coloured stalk {{convert|2-6|mm|in|sigfig=1|abbr=on}} long. The labellum is {{convert|9-15|mm|in|sigfig=1|abbr=on}} long and has three lobes. The centre lobe is broadly egg-shaped to fan-shaped, {{convert|7-12|mm|in|sigfig=1|abbr=on}} long and {{convert|12-20|mm|in|sigfig=1|abbr=on}} wide and the side lobes are linear to wedge-shaped, {{convert|3-5|mm|in|sigfig=1|abbr=on}} long and {{convert|1.5-4|mm|in|sigfig=1|abbr=on}} wide. There are two ridge-like calli about {{convert|5|mm|in|sigfig=1|abbr=on}} long, surrounded by yellow in the mid-line of the labellum. Flowering occurs from September to December.{{cite book|last1=Jones|first1=David L.|title=A complete guide to native orchids of Australia including the island territories|date=2006|publisher=New Holland|location=Frenchs Forest, N.S.W.|isbn=1877069124|page =133}}{{cite web|last1=Jones|first1=David L.|title=Diuris punctata|url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Diuris~punctata|publisher=Royal Botanic Garden Sydney|accessdate=10 March 2018}}

Diuris punctata was first formally described in 1804 by James Edward Smith and the description was published in Exotic Botany.{{cite web|title=Duiris punctata|url= https://id.biodiversity.org.au/instance/apni/520562|publisher=APNI|accessdate=10 March 2018}}{{cite book|last1=Smith|first1=James Edward|title=Exotic Botany (Volume 1)|date=1804|publisher=R. Taylor and Co.|location=London|pages=13–14|url=https://babel.hathitrust.org/cgi/pt?id=hvd.32044106459126;view=1up;seq=49|accessdate=10 March 2018}} The specific epithet (punctata) is a Latin word meaning "spotted".{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page =742}}

The purple donkey orchid is found in New South Wales, the Australian Capital Territory and Victoria growing in forest and grassland. In New South Wales it occurs south from the Moonbi Range and in Victoria north from the Mornington Peninsula. A form known as Diuris punctata var. sulfurea was known from a property near Guyra but is now thought to be extinct. It had smaller, yellow flowers.

Diuris punctata is classed as "threatened" in Victoria under the Flora and Fauna Guarantee Act 1988. The main threats to the species are competition from weeds and grasses, grazing and soil disturbance.{{cite web|title=Purple Diuris Diuris punctata var. punctata|url=https://www.environment.vic.gov.au/__data/assets/pdf_file/0022/32656/Purple_Diuris_Diuris_punctata_var._punctata.pdf|publisher=Victorian Government Department of Sustainability and Environment|accessdate=11 March 2018}}

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punctata

Category:Orchids of New South Wales

Category:Orchids of Victoria (state)

Category:Orchids of the Australian Capital Territory

Category:Endemic orchids of Australia

Category:Plants described in 1804

Category:Taxa named by James Edward Smith