Chiloglottis trullata
{{Short description|Species of orchid}}
{{Use Australian English|date=August 2024}}
{{Speciesbox
| name = Triangular ant orchid
| image =
| image_caption =
| status =
| status_system =
| taxon = Chiloglottis trullata
| authority = D.L.Jones{{cite web |title=Chiloglottis trullata |url=https://biodiversity.org.au/nsl/services/apc-format/display/117397 |publisher=Australian Plant Census |access-date=28 October 2023}}
| synonyms = Myrmechila trullata (D.L.Jones) D.L.Jones & M.A.Clem.
}}
Chiloglottis trullata, commonly known as the triangular ant orchid, is a species of orchid endemic to Queensland, Australia. It has two dark green leaves and a single small, green or pinkish flower with a shiny, dark reddish black, insect-like callus surrounded by reddish club-shaped calli covering most of the upper surface of the labellum.
Description
Chiloglottis trullata is a terrestrial, perennial, deciduous, herb with two ground-hugging, dark green, oblong to elliptic leaves {{convert|50-80|mm|in|sigfig=1|abbr=on}} long and {{convert|15-25|mm|in|sigfig=1|abbr=on}} wide on a petiole {{convert|3-5|mm|in|sigfig=1|abbr=on}} long. A single green or pinkish flower {{convert|8-10|mm|in|sigfig=1|abbr=on}} long and {{convert|5-6|mm|in|sigfig=2|abbr=on}} wide is borne on a flowering stem {{convert|50-75|mm|in|sigfig=1|abbr=on}} high. The dorsal sepal is spatula-shaped, {{convert|10-11|mm|in|sigfig=2|abbr=on}} long and about {{convert|2|mm|in|sigfig=1|abbr=on}} wide. The lateral sepals are linear, {{convert|9-10|mm|in|sigfig=2|abbr=on}} long, about {{convert|1|mm|in|sigfig=1|abbr=on}} wide and curve downwards and away from each other. There is a glandular tip about {{convert|1|mm|in|sigfig=1|abbr=on}} long on the end of all three sepals. The petals are linear to lance-shaped with the narrower end towards the base, {{convert|8-9|mm|in|sigfig=1|abbr=on}} long, about {{convert|2.5|mm|in|sigfig=1|abbr=on}} wide and turn downwards towards the ovary. The labellum is broadly trowel-shaped, {{convert|7-8|mm|in|sigfig=2|abbr=on}} long and {{convert|5-6|mm|in|sigfig=2|abbr=on}} wide. There is a shiny, dark reddish black, insect-like callus with a handlebar-shaped, stalked "head" end about {{convert|1.5|mm|in|sigfig=1|abbr=on}} long and {{convert|2|mm|in|sigfig=1|abbr=on}} wide. The callus and associated glands occupy most of the upper surface of the labellum. The column is pale green with a few purple spots, {{convert|7-8|mm|in|sigfig=2|abbr=on}} long and about {{convert|3|mm|in|sigfig=1|abbr=on}} wide with narrow wings. Flowering occurs in July and August.{{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 =142}}{{cite journal|last1=Jones|first1=David L.|title=New taxa of Australian Orchidaceae|journal=Australian Orchid Research|date=1991|volume=2|pages=42–43}}
Taxonomy and naming
Chiloglottis trullata was first formally described in 1991 by David Jones from a specimen collected in the Blackdown Tableland National Park and the description was published in Australian Orchid Research.{{cite web|title=Chiloglottis trullata|url= https://id.biodiversity.org.au/instance/apni/551604|publisher=APNI|accessdate=24 April 2018}} The specific epithet (trullata) is a Latin word meaning "trowel",{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|authorlink1=Roland W. Brown|page=817}} referring to the shape of the labellum.